F.A. NASYBULLINA1, G.R. VAGAPOVA1, B.Yu. PASHAEV2  1Kazan State Medical Academy, 11 Mushtari St., Kazan, Russian Federation 420012 2Kazan State Medical University, 49Butlerova St., Kazan, Russian Federation 420012 Nasybullina F.A. — postgraduate student of the Department of Endocrinology, tel. +7-917-256-17-59, e-mail: nasybullinaf@mail.ru Vagapova G.R. — D. med. Sc., Professor, Head of Department of Endocrinology, tel. +7-917-269-59-28, e-mail: g.r.vagapova@gmail.com Pashaev B.Yu. — […]