E. A. Yablokova
Research Clinical Institute of Childhood of the Moscow Region; First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University)
Russian Federation

Ekaterina A. Yablokova, MD, PhD, MSc (Medicine), Leading Researcher of the Department of Pediatrics; associate professor of the Department of Children’s Diseases, Filatov Clinical Institute

B. Serpukhovskaya, 62, Moscow, 115093, Russia

8–2 Trubetskaya str. Moscow, 119991, Russia 

A. K. Dzhabarova
First Pavlov State Medical University of St. Petersburg
Russian Federation

Aida K. Dzhabarova, 6th year student of the Faculty of Medicine

6–8 Lva Tolstogo St., 197022, St. Petersburg, 197022, Russia 

M. M. Lokhmatov
First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University)
Russian Federation

Maksim M. Lokhmatov, MD, PhD, Dr Sci, Professor, head of the Department of endoscopic examinations; professor of the Department of pediatric surgery, urology and uroandrology 

8–2 Trubetskaya str. Moscow, 119991, Russia 

A. V. Gorelov
First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University); Federal budget institute of science “Central research institute of epidemiology” of the Federal Service on Surveillance for consumer rights protection and human well-being
Russian Federation

Aleksandr V. Gorelov, MD, PhD, DSc (Medicine), Аcademician of the Russian Academy of Sciences Professor, Professor of the Department of Childhood Diseases, N. F. Filatov Institute of Child Health; Director for Research

8–2 Trubetskaya str. Moscow, 119991, Russia 

3A, Novogireevskaya str. Moscow, 111123, Russia 

S. B. Krutikhina
First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University)
Russian Federation

Svetlana B. Krutikhina, MD, PhD, Associate Professor, Department of Childhood Diseases, N. F. Filatov Institute of Child Health

8–2 Trubetskaya str. Moscow, 119991, Russia 

M. I. Erokhina
Research Clinical Institute of Childhood of the Moscow Region
Russian Federation

Maria I. Erokhina MD., Head of the Department of Gastroenterology

B. Serpukhovskaya, 62, Moscow, 115093, Russia 

E. V. Chibrina
Research Clinical Institute of Childhood of the Moscow Region
Russian Federation

Elena V. Chibrina MD., MD, PhD, MSc (Medicine), gastroenterologist

B. Serpukhovskaya, 62, Moscow, 115093, Russia 

A. M. Rimskaya
First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University)
Russian Federation

Alena M. Rimskaya, MD, graduate student of the Department of Childhood Diseases, N. F. Filatov Institute of Child Health

8–2 Trubetskaya str. Moscow, 119991, Russia 

A. I. Khavkin
Research Clinical Institute of Childhood of the Moscow Region; Veltischev Research and Clinical Institute for Pediatrics and Pediatric Surgery of the Pirogov Russian National Research Medical University Research Clinical Institute of Pediatrics; Belgorod National Research University
Russian Federation

Anatoly I. Khavkin, MD, PhD, DSc (Medicine), Professor, Head of the Moscow Regional Center for Pediatric Gastroenterology, Hepatology and Abdominal Surgery 

B. Serpukhovskaya, 62, Moscow, 115093, Russia 

2, Taldomskaya str., Moscow, 125412, Russia 

85, st. Pobedy, Belgorod, 308015, Russia