1. Internal Medicine Department #2, Sechenov First Moscow State Medical University , Kolomensky passage 12/4, Moscow 119991 , Russia
2. Endocrinology Department, City Polyclinic No. 1 , Kuibysheva 3, Bryansk 241035 , Russia
3. Institute of Antimicrobial Chemotherapy, Smolensk State Medical University , Kirova 46-A, Smolensk 214019 , Russia