M. A. Kazumian
Rostov State Medical University, Rostov-on-Don
Russian Federation

Maria A. Kazumian, post-graduate student of the department of children’s diseases №3, assistant Professor Department of propaedeutics of children’s diseases

A. V. Vasilenok
Dmitry Rogachev National Research Center of Pediatric Hematology, Oncology and Immunology, Moscow; Pirogov Russian National Research Medical University, Moscow
Russian Federation

Alexander V. Vasilenok, PhD, senior researcher, Department of interdisciplinary Oncology, national medical research center of pediatric Hematology, Oncology and immunology named aft er Dmitry Rogachev; associate Professor of Oncology, Hematology, radiotherapy PF, the Russian national research medical University named after N. And. Pirogov.

E. D. Teplyakova
Rostov State Medical University, Rostov-on-Don; Children’s Municipal Polyclinic No. 4, Rostov-on-Don
Russian Federation

Elena D. Teplyakova, MD, associate Professor of children’s  diseases Department №3, Rostov state medical University; Chief physician, children’s city polyclinic №4.