[1] St Ioasaf Belgorod Reg Clin Hosp, Internal Med, Belgorod 308007, Russia
[2] Dnipropetrovsk State Med Acad, Internal Med, UA-49044 Dnepropetrovsk, Ukraine
[3] Cent City Hosp, Internal Med, Labytnangi 629400, Russia
[4] VI Kulakov Res Ctr Obstet Gynecol & Perinatol, Internal Med, Moscow 117997, Russia