For citations:
Nikitina NM, Afanasyev IA, Romanova TA, Rebrov AP. Specific features of comorbidity in rheumatoid arthritis patients in different follow-up years. Sovremennaya Revmatologiya=Modern Rheumatology Journal. 2015;9(1):39-43. (In Russ.) https://doi.org/10.14412/1996-7012-2015-1-39-41