M.V. VASILYEV1, I.V. RYABCHIKOV1,2 1Children’s Republican Clinical Hospital, 140 Orenburgskiy Trakt, Kazan, Russian Federation, 420138 2Kazan (Volga) Federal University, 74 Karl Marx Str., Kazan, Russian Federation, 420012  Vasilyev M.V. ― Cand. Med. Sc., doctor-traumatologist, tel. (843) 221-94-03, e-mail: mi.vasilev@tatar.ru Ryabchikov I.V. ― D. Med. Sc., Head of the Center for Outpatient Traumatology and Orthopedics, Associate […]