For citations:

Fyodorova O.S., Petrovskaya Yu.A., Fedotova M.M. Epidemiologic investigation of the efficiency of bronchial asthma preventive pharmacotherapy (ETAC). Bulletin of Siberian Medicine. 2004;3(3):31-35. (In Russ.) https://doi.org/10.20538/1682-0363-2004-3-31-35