1. Internal Medicine Department #2, Sechenov First Moscow State Medical University, Moscow, Russian Federation
2. Intensive Therapy Laboratory, Research Institute of Rheumatology Named after V.A. Nasonova, Moscow, Russian Federation
3. LLC 'Medilux,' 'MedSwiss' Clinics Network, Moscow, Russian Federation
4. Medical Faculty, Peoples' Friendship University of Russia, Moscow, Russian Federation