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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">ssmu</journal-id><journal-title-group><journal-title xml:lang="ru">Бюллетень сибирской медицины</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of Siberian Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1682-0363</issn><issn pub-type="epub">1819-3684</issn><publisher><publisher-name>Siberian State Medical University, the Ministry of Healthcare of the Russian Federation</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20538/1682-0363-2022-3-59-66</article-id><article-id custom-type="elpub" pub-id-type="custom">ssmu-4907</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL PAPERS</subject></subj-group></article-categories><title-group><article-title>Кальпротектин в плазме крови как новый биомаркер в оценке активности ревматоидного артрита</article-title><trans-title-group xml:lang="en"><trans-title>Сalprotectin in the blood plasma as a new biomarker for assessing the activity of rheumatoid arthritis</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2159-1685</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Королькова</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Korolkova</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Королькова Анастасия Александровна – врач-ревматолог, аспирант, кафедра внутренних болезней, НМИЦ им. В.А. Алмазова.</p><p>197341, Санкт-Петербург, ул. Аккуратова, 2</p></bio><bio xml:lang="en"><p>2, Akkuratova Str., St. Petersburg, 197341</p></bio><email xlink:type="simple">ana9099588@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4967-472X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хижа</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Khizha</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хижа Виталий Валентинович – аспирант, ИЭФБ РАН.</p><p>197341, г. Санкт-Петербург, ул. Тореза, 44</p></bio><bio xml:lang="en"><p>44, Toreza Str., St. Petersburg, 197341</p></bio><email xlink:type="simple">khizhaspb@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1767-2754</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Козлова</surname><given-names>Д. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozlova</surname><given-names>D. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Козлова Дарья Игоревна – кандидат биологических наук, ст. научный сотрудник, ИЭФБ РАН.</p><p>197341, г. Санкт-Петербург, ул. Тореза, 44</p></bio><bio xml:lang="en"><p>44, Toreza Str., St. Petersburg, 197341</p></bio><email xlink:type="simple">di.kozlova.official@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Маслянский</surname><given-names>А. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Maslyanskiy</surname><given-names>A. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Маслянский Алексей Леонидович – доктор медицинских наук, доцент, врач-ревматолог, зав. НИЛ ревматологии, НМИЦ им. В.А. Алмазова.</p><p>197341, Санкт-Петербург, ул. Аккуратова, 2</p></bio><bio xml:lang="en"><p>2, Akkuratova Str., St. Petersburg, 197341</p></bio><email xlink:type="simple">esc_4@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8537-3639</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Вавилова</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vavilova</surname><given-names>T. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Вавилова Татьяна Владимировна – доктор медицинских наук, профессор, за. лабораторией медицины и генетики, НМИЦ им. В.А. Алмазова, гл. внештатный специалист по клинической лабораторной диагностике Северо-Западного федерального округа.</p><p>197341, Санкт-Петербург, ул. Аккуратова, 2</p></bio><bio xml:lang="en"><p>2, Akkuratova Str., St. Petersburg, 197341</p></bio><email xlink:type="simple">vtv.lab.spb@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный медицинский исследовательский центр (НМИЦ) им. В.А. Алмазова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Almazov National Medical Research Center</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт эволюционной физиологии и биохимии им. И.М. Сеченова, Российская академия наук (ИЭФБ РАН)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>14</day><month>10</month><year>2022</year></pub-date><volume>21</volume><issue>3</issue><fpage>59</fpage><lpage>66</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Королькова А.А., Хижа В.В., Козлова Д.И., Маслянский А.Л., Вавилова Т.В., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Королькова А.А., Хижа В.В., Козлова Д.И., Маслянский А.Л., Вавилова Т.В.</copyright-holder><copyright-holder xml:lang="en">Korolkova A.A., Khizha V.V., Kozlova D.I., Maslyanskiy A.L., Vavilova T.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://bulletin.ssmu.ru/jour/article/view/4907">https://bulletin.ssmu.ru/jour/article/view/4907</self-uri><abstract><sec><title>Цель</title><p>Цель. Изучить возможность применения и информативность кальпротектина плазмы крови в качестве нового биомаркера для оценки активности ревматоидного артрита (РА).</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. В исследование включены 113 человек, 79 пациентов с диагнозом РА (основная группа); средний возраст 58 (± 11,66) лет, медиана длительности заболевания 10 [6; 15] лет. Группу контроля составили 34 здоровых добровольца; средний возраст 40 (± 11,14) лет. У пациентов с РА активность заболевания определялась по индексу DAS28 (Disease Activity Score), а также по клиническому индексу CDAI (Clinical Disease Activity Index). Концентрация кальпротектина в плазме крови определялась методом твердофазного иммуноферментного анализа. Полученные данные сопоставлялись с лабораторными и клиническими параметрами, а также композитными индексами (DAS28, CDAI) активности РА. Для математической обработки данных использовались ранговая корреляция по Спирмену, дискриминантный и ROC-анализы.</p></sec><sec><title>Результаты</title><p>Результаты. В группе больных РА содержание кальпротектина в крови было более высоким по сравнению с контрольной группой. Выявлена значимая связь уровня кальпротектина крови со всеми параметрами активности РА. При проведении ROC-анализа диагностическая точность, чувствительность и специфичность уровня кальпротектина в плазме крови были выше для оценки суставного синдрома, а также композитных индексов CDAI и DAS28 в сравнении с содержанием скорости оседания эритроцитов (СОЭ) и С-реактивного белка (СРБ). По данным дискриминантного анализа, наиболее информативным оказалось сочетание уровней СОЭ и кальпротектина, для которых вероятность правильной классификации активности РА, согласно индексу DAS28, составила 71%. Для индекса CDAI статистически значимую классификацию давал только кальпротектин с вероятностью 70,5%.</p></sec><sec><title>Заключение</title><p>Заключение. Кальпротектин плазмы крови – перспективный лабораторный биомаркер в оценке активности синовита при РА, демонстрирующий более высокую информативность, чем традиционные острофазовые показатели.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Aim</title><p>Aim. To study the potential use and information value of calprotectin in the blood plasma as a new biomarker for determining the activity of rheumatoid arthritis (RA).</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The study included 113 people. The treatment group consisted of 79 patients diagnosed with RA; the average age was 58 (± 11.66) years, the median duration of the disease was 10 [6; 15] years. The control group encompassed 34 healthy volunteers; the average age was 40 (± 11.14) years. RA activity was determined according to the Disease Activity Score (DAS) 28 and the Clinical Disease Activity Index (CDAI). The concentration of calprotectin in the blood plasma was determined by the solid-phase enzyme-linked immunosorbent assay. The obtained results were compared with laboratory and clinical parameters, as well as with composite indices (DAS28, CDAI) of RA activity. For mathematical data processing, Spearman’s rank correlation coefficient, linear discriminant analysis, and ROC analysis were used.</p></sec><sec><title>Results</title><p>Results. In the group of patients with RA, the level of calprotectin in the blood was higher than in the control group. A statistically significant relationship was revealed between the level of calprotectin in the blood and all standard parameters of RA activity. The ROC analysis showed that the sensitivity, specificity, and diagnostic accuracy in assessing articular syndrome, as well as moderate and high RA activity according to the composite indices DAS28 and CDAI were higher for calprotectin than for erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP). The linear discriminant analysis showed that a combination of ESR and calprotectin levels was the most informative; following it, the probability of correct classification of RA activity, according to the DAS28 index, was 71%. For the CDAI index, only one marker, calprotectin, resulted in a statistically significant classification with a probability of 70.5 %.</p></sec><sec><title>Conclusion</title><p>Conclusion. Сalprotectin in the blood plasma is a promising laboratory biomarker for assessing synovitis activity in RA demonstrating higher accuracy, sensitivity, and specificity than traditional acute-phase reactants.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>ревматоидный артрит</kwd><kwd>активность</kwd><kwd>кальпротектин</kwd></kwd-group><kwd-group xml:lang="en"><kwd>rheumatoid arthritis</kwd><kwd>activity</kwd><kwd>calprotectin</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Smolen J.S., Aletaha D., Bijlsma J.W., Breedveld F.C., Boumpas D., Burmester G. et al. T2T Expert committee. Treating rheumatoid arthritis to target: recommendations of an international task force. Ann. Rheum. Dis. 2010;69(4):631–637. DOI: 10.1136/ard.2009.123919.</mixed-citation><mixed-citation xml:lang="en">Smolen J.S., Aletaha D., Bijlsma J.W., Breedveld F.C., Boumpas D., Burmester G. et al. T2T Expert committee. Treating rheumatoid arthritis to target: recommendations of an international task force. Ann. Rheum. Dis. 2010;69(4):631–637. DOI: 10.1136/ard.2009.123919.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Fransen J., Stucki G., van Riel P.L.C.M. Rheumatoid arthritis measures: Disease Activity Score (DAS), Disease Activity Score-28 (DAS28), Rapid Assessment of Disease Activity in Rheumatology (RADAR) and Rheumatoid Arthritis Disease Activity Index (RADAI). Arthritis &amp; Rheumatism. 2003;49:214–224. DOI: 10.1002/art.11407.</mixed-citation><mixed-citation xml:lang="en">Fransen J., Stucki G., van Riel P.L.C.M. Rheumatoid arthritis measures: Disease Activity Score (DAS), Disease Activity Score-28 (DAS28), Rapid Assessment of Disease Activity in Rheumatology (RADAR) and Rheumatoid Arthritis Disease Activity Index (RADAI). Arthritis &amp; Rheumatism. 2003;49:214–224. DOI: 10.1002/art.11407.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Prevoo M.L., van ‘t Hof M.A., Kuper H.H., van Leeuwen M.A., van de Putte L.B., van Riel P.L. Modified disease activity scores that include twenty-eight-joint counts. Development and validation in a prospective longitudinal study of patients with rheumatoid arthritis. Arthritis Rheum. 1995;38(1):44–48. DOI: 10.1002/art.1780380107. PMID: 7818570.</mixed-citation><mixed-citation xml:lang="en">Prevoo M.L., van ‘t Hof M.A., Kuper H.H., van Leeuwen M.A., van de Putte L.B., van Riel P.L. Modified disease activity scores that include twenty-eight-joint counts. Development and validation in a prospective longitudinal study of patients with rheumatoid arthritis. Arthritis Rheum. 1995;38(1):44–48. DOI: 10.1002/art.1780380107. PMID: 7818570.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">De Jong P.H., Hazes J.M., van Zeben D., van der Lubbe P.A., de Jager M.H., de Sonnaville P.B. at al. Treatment decisions and related costs differ significantly depending on the choice of a disease activity index in RA, according to 1987 and 2010 classification criteria. Rheumatology (Oxford). 2012;51(7):1269– 1277. DOI: 10.1093/rheumatology/kes008.</mixed-citation><mixed-citation xml:lang="en">De Jong P.H., Hazes J.M., van Zeben D., van der Lubbe P.A., de Jager M.H., de Sonnaville P.B. at al. Treatment decisions and related costs differ significantly depending on the choice of a disease activity index in RA, according to 1987 and 2010 classification criteria. Rheumatology (Oxford). 2012;51(7):1269– 1277. DOI: 10.1093/rheumatology/kes008.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Marks J.L., Holroyd C.R., Dimitrov B.D., Armstrong R.D., Calogeras A., Cooper C. et al. Does combined clinical and ultrasound assessment allow selection of individuals with rheumatoid arthritis for sustained reduction of anti-tumor necrosis factor therapy? Arthritis Care Res. (Hoboken). 2015;67(6):746– 753. DOI: 10.1002/acr.22552.</mixed-citation><mixed-citation xml:lang="en">Marks J.L., Holroyd C.R., Dimitrov B.D., Armstrong R.D., Calogeras A., Cooper C. et al. Does combined clinical and ultrasound assessment allow selection of individuals with rheumatoid arthritis for sustained reduction of anti-tumor necrosis factor therapy? Arthritis Care Res. (Hoboken). 2015;67(6):746– 753. DOI: 10.1002/acr.22552.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Miranda-García P., Chaparro M., Gisbert J.P. Correlation between serological biomarkers and endoscopic activity in patients with inflammatory bowel disease. Gastroenterol. Hepatol. 2016;39(8):508–515. DOI: 10.1016/j.gastrohep.2016.01.015.</mixed-citation><mixed-citation xml:lang="en">Miranda-García P., Chaparro M., Gisbert J.P. Correlation between serological biomarkers and endoscopic activity in patients with inflammatory bowel disease. Gastroenterol. Hepatol. 2016;39(8):508–515. DOI: 10.1016/j.gastrohep.2016.01.015.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Korndörfer I.P., Brueckner F., Skerra A. The crystal structure of the human (S100A8/S100A9)2 heterotetramer, calprotectin, illustrates how conformational changes of interacting alpha-helices can determine specific association of two EF-hand proteins. J. Mol. Biol. 2007;370(5):887–898. DOI: 10.1016/j.jmb.2007.04.065.</mixed-citation><mixed-citation xml:lang="en">Korndörfer I.P., Brueckner F., Skerra A. The crystal structure of the human (S100A8/S100A9)2 heterotetramer, calprotectin, illustrates how conformational changes of interacting alpha-helices can determine specific association of two EF-hand proteins. J. Mol. Biol. 2007;370(5):887–898. DOI: 10.1016/j.jmb.2007.04.065.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Romand X., Bernardy C., Nguyen M.V.C., Courtier A., Trocme C., Clapasson M. et al. Systemic calprotectin and chronic inflammatory rheumatic diseases. Joint Bone Spine. 2019;86(6):691–698. DOI: 10.1016/j.jbspin.2019.01.003.</mixed-citation><mixed-citation xml:lang="en">Romand X., Bernardy C., Nguyen M.V.C., Courtier A., Trocme C., Clapasson M. et al. Systemic calprotectin and chronic inflammatory rheumatic diseases. Joint Bone Spine. 2019;86(6):691–698. DOI: 10.1016/j.jbspin.2019.01.003.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Lee D.G., Woo J.W., Kwok S.K., Cho M.L., Park S.H. MRP8 promotes Th17 differentiation via upregulation of IL-6 production by fibroblast-like synoviocytes in rheumatoid arthritis. Exp. Mol. Med. 2013;45(4):20. DOI: 10.1038/ emm.2013.39.</mixed-citation><mixed-citation xml:lang="en">Lee D.G., Woo J.W., Kwok S.K., Cho M.L., Park S.H. MRP8 promotes Th17 differentiation via upregulation of IL-6 production by fibroblast-like synoviocytes in rheumatoid arthritis. Exp. Mol. Med. 2013;45(4):20. DOI: 10.1038/ emm.2013.39.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Abildtrup M., Kingsley G.H., Scott D.L. Calprotectin as a biomarker for rheumatoid arthritis: a systematic review. J. Rheumatol. 2015;42(5):760–770. DOI: 10.3899/jrheum.140628.</mixed-citation><mixed-citation xml:lang="en">Abildtrup M., Kingsley G.H., Scott D.L. Calprotectin as a biomarker for rheumatoid arthritis: a systematic review. J. Rheumatol. 2015;42(5):760–770. DOI: 10.3899/jrheum.140628.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Bae S.C., Lee Y.H. Calprotectin levels in rheumatoid arthritis and their correlation with disease activity: a meta-analysis. Postgrad. Med. 2017;129(5):531–537. DOI: 10.1080/00325481.2017.131972.</mixed-citation><mixed-citation xml:lang="en">Bae S.C., Lee Y.H. Calprotectin levels in rheumatoid arthritis and their correlation with disease activity: a meta-analysis. Postgrad. Med. 2017;129(5):531–537. DOI: 10.1080/00325481.2017.131972.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Hurnakova J., Zavada J., Hanova P., Hulejova H., Klein M., Mann H. et al. Serum calprotectin (S100A8/9): an independent predictor of ultrasound synovitis in patients with rheumatoid arthritis. Arthritis Res. Ther. 2015;17(1):252. DOI: 10.1186/ s13075-015-0764-5.</mixed-citation><mixed-citation xml:lang="en">Hurnakova J., Zavada J., Hanova P., Hulejova H., Klein M., Mann H. et al. Serum calprotectin (S100A8/9): an independent predictor of ultrasound synovitis in patients with rheumatoid arthritis. Arthritis Res. Ther. 2015;17(1):252. DOI: 10.1186/ s13075-015-0764-5.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Jarlborg M., Courvoisier D.S., Lamacchia C., Martinez Prat L., Mahler M. Bentow C. et al. Physicians of the Swiss Clinical Quality Management (SCQM) registry. Serum calprotectin: a promising biomarker in rheumatoid arthritis and axial spondyloarthritis. Arthritis Res. Ther. 2020;22(1):105. DOI: 10.1186/s13075-020-02190-3.</mixed-citation><mixed-citation xml:lang="en">Jarlborg M., Courvoisier D.S., Lamacchia C., Martinez Prat L., Mahler M. Bentow C. et al. Physicians of the Swiss Clinical Quality Management (SCQM) registry. Serum calprotectin: a promising biomarker in rheumatoid arthritis and axial spondyloarthritis. Arthritis Res. Ther. 2020;22(1):105. DOI: 10.1186/s13075-020-02190-3.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Hammer H.B., Ødegård S., Syversen S.W., Lande wé R., van der Heijde D., Uhlig T. et al. Calprotectin (a major S100 leucocyte protein) predicts 10-year radiographic progression in patients with rheumatoid arthritis. Ann. Rheum. Dis. 2010;69(1):150–154. DOI: 10.1136/ard.2008.103739.</mixed-citation><mixed-citation xml:lang="en">Hammer H.B., Ødegård S., Syversen S.W., Lande wé R., van der Heijde D., Uhlig T. et al. Calprotectin (a major S100 leucocyte protein) predicts 10-year radiographic progression in patients with rheumatoid arthritis. Ann. Rheum. Dis. 2010;69(1):150–154. DOI: 10.1136/ard.2008.103739.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Bach M., Moon J., Moore R., Pan T., Nelson J.L., Lood C. A neutrophil activation biomarker panel in prognosis and monitoring of patients with rheumatoid arthritis. Arthritis Rheumatol. 2020;72(1):47–56. DOI: 10.1002/art.41062.</mixed-citation><mixed-citation xml:lang="en">Bach M., Moon J., Moore R., Pan T., Nelson J.L., Lood C. A neutrophil activation biomarker panel in prognosis and monitoring of patients with rheumatoid arthritis. Arthritis Rheumatol. 2020;72(1):47–56. DOI: 10.1002/art.41062.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Altman R., Asch E., Bloch D., Bole G., Borenstein D., Brandt K. et al. Development of criteria for the classification and reporting of osteoarthritis. Classification of osteoarthritis of the knee. Diagnostic and Therapeutic Criteria Committee of the American Rheumatism Association. Arthritis Rheum. 1986;29(8):1039–1049. DOI: 10.1002/art.1780290816.</mixed-citation><mixed-citation xml:lang="en">Altman R., Asch E., Bloch D., Bole G., Borenstein D., Brandt K. et al. Development of criteria for the classification and reporting of osteoarthritis. Classification of osteoarthritis of the knee. Diagnostic and Therapeutic Criteria Committee of the American Rheumatism Association. Arthritis Rheum. 1986;29(8):1039–1049. DOI: 10.1002/art.1780290816.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
