E. M. Spivak
Yaroslavl State Medical University
Russian Federation

Evgeny M. Spivak, MD, professor of Pediatric department № 1

150000, Yaroslavl, Revolutionary Str., build. 5

A. I. Khavkin
Scientific Research Clinical Institution of Childhood of the Ministry of Health of the Moscow Region; Belgorod State Research University
Russian Federation

Anatoly I. Khavkin, MD, PhD, Dr Sci, Professor, Head of the Moscow Regional Center for Pediatric Gastroenterology, Hepatology and Abdominal Surgery; Professor of the Department of Pediatrics with a course of pediatric surgical diseases at the Medical Institute

115093, Moscow, str. Bolshaya Serpukhovskaya, build. 62
308015, Belgorod region, Belgorod, st. Pobedy, build.85