I. I. Sergeev
Chuvash State University named after I.N. Ulyanov
Russian Federation

Assistant at the Department of Pediatrics and Pediatric Surgery

428015, Chuvash Republic, Cheboksary, Moskovsky Prosp., 15

K. D. Burtsev
Chuvash State University named after I.N. Ulyanov
Russian Federation

Assistant at the Department of Traumatology, Orthopedics and Emergency Medicine

428015, Chuvash Republic, Cheboksary, Moskovsky Prosp., 15

N. S. Smetanina
Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology, Ministry of Health of Russia
Russian Federation

Dr. of Sci. (Med.), Professor, Deputy Director General – Director of Regional Scientific and Analytical Work

1 Samory Mashela St., Moscow, 117997