For citations:
Nasonov E.L., Popkova T.V., Panafidina T.A. Problems of early diagnosis of systemic lupus erythematosus during the COVID-19 pandemic. Rheumatology Science and Practice. 2021;59(2):119-128. (In Russ.) https://doi.org/10.47360/1995-4484-2021-119-128