For citations:

Kulikov A.N., Muravyeva N.V., Belov B.S. Frequency and course of COVID-19 in patients with rheumatic diseases (according to the data of V.A. Nasonova Research Institute of Rheumatology). Rheumatology Science and Practice. 2023;61(5):537-544. (In Russ.) https://doi.org/10.47360/1995-4484-2023-537-544