For citations:
Son I.M., Ivanova M.A., Sokolovskaya T.A., Liutsko V.V., Dezhurny L.I. Activity and the density of rheumatologists in Russian Federation, 2013-2017. Cardiovascular Therapy and Prevention. 2019;18(1):134-142. (In Russ.) https://doi.org/10.15829/1728-8800-2019-1-134-142