N.V. KRINITSKAYA1, O.G. PECHERITSA1, M.R. SHAIDULLINA1,2, Yu.V. ISKHAKOVA1 1Children Republic Clinical Hospital, 140 Orenburgskiy Trakt, Kazan, Russian Federation, 420138 2Kazan State Medical University, 49 Butlerov Str., Kazan, Russian Federation, 420012  Krinitskaya N.V. — Head of Endocrinology Department, tel. (843) 237-30-05, e-mail: Natalya.Krinickaya@tatar.ru Pecheritsa O.G. — Cand. Med. Sc., doctor of Endocrinology Department, tel. (843) 237-30-05, […]