A. S. Stadnikova
Bashlyaeva City Children’s Clinical Hospital; Peoples’ Friendship University of Russia
Russian Federation

Antonina S. Stadnikova, Cand. Sci. (Med.), STD and Skin Specialist; Teaching Assistant, Department of Dermatovenerology with Cosmetology Course, Faculty of Continuing Medical Education

 28, Geroev Panfilovtsev St., Moscow, 125373, Russia 

6, Miklukho-Maklai St., Moscow, 117198, Russia; 

G. A. Novik
St Petersburg State Pediatric Medical University
Russian Federation

 Gennady A. Novik, Dr. Sci. (Med.), Professor, Head of the Department of Children’s Diseases named after Professor I.M. Vorontsov

2. Litovskaya St., St Petersburg, 194100, Russia 

G. E. Bagramova
Peoples’ Friendship University of Russia
Russian Federation

Gayaneh E. Bagramova, Dr. Sci. (Med.), Professor of the Department of Dermatovenerology with Cosmetology Course, Faculty of Continuing
Medical Education

6, Miklukho-Maklai St., Moscow, 117198, Russia 

A. S. Vorobeva
Bashlyaeva City Children’s Clinical Hospital
Russian Federation

Alexandra S. Vorobeva, Cand. Sci. (Med.), Head of Paediatrics Department No 1

28, Geroev Panfilovtsev St., Moscow, 125373, Russia