V. P. Gavrilyuk
Kursk State Medical University; Regional Children’s Clinical Hospital
Russian Federation

Vasily P. Gavrilyuk, Dr. Sci. (Med.), Associate Professor, Head of the Department of Pediatric Surgery and Pediatrics, Institute of Continuing Education; Pediatric
Surgeon, Surgical Department no. 2 

 3, K. Marks str., Kursk, 305041 

D. A. Severinov
Kursk State Medical University; Regional Children’s Clinical Hospital
Russian Federation

Dmitry A. Severinov, Cand. Sci. (Med.), Assistant, Department of Pediatric Surgery and Pediatrics, Institute of Continuing Education; Pediatric Surgeon, Surgical Department no. 2 

 3, K. Marks str., Kursk, 305041 

I. V. Frishko
Kursk State Medical University
Russian Federation

 Ivan V. Frishko, 6th year student, Faculty of Pediatrics 

 3, K. Marks str., Kursk, 305041 

V. V. Sytkov
A.I. Yevdokimov Moscow State University of Medicine and Dentistry
Russian Federation

Valentin V. Sytkov, Cand. Sci. (Med.), Lecture assistant, Department of Pediatric Surgery

Moscow