D.V. Pechkurov, A.A. Tyazheva, A.M. Konovalova, E.S. Lipatova Samara State Medical University, 89 Chapayevskaya Str., 443099 Samara, Russian Federation  Pechkurov D.V. — Doc. Med. Sc., Professor, Head of the Department of Children’s Diseases, tel. (846) 959-45-11, e-mail: dmpechkurov@yandex.ru Tyazheva A.A. — Cand. Med. Sc., Assistant Lecturer of the Department of Children’s Diseases, tel. (846)959-45-11, e-mail: aatyajeva@mail.ru […]