V. P. Novikova
St. Petersbur State Pediatric Medical University, Ministry of Healthcare of the Russian Federation
Russian Federation

Valeriya P. Novikova, MD, PhD, DSc, professor, head of the department of introduction to paediatric diseases with the course of baby care, head of the laboratory of medico- social problems in paediatrics

194100, Saint Petersburg, Litovskaya str., g, 2

V. L. Gritsinskaya
St. Petersbur State Pediatric Medical University, Ministry of Healthcare of the Russian Federation
Russian Federation

Vera L. Gritsinskaya, MD, PhD, DSc, leading researcher of the laboratory of medical and social problems in pediatrics

194100, Saint Petersburg, Litovskaya str., g, 2

A. I. Khavkin
N. I. Pirogov Russian National Research Medical University
Russian Federation

Anatoly I. Khavkin, MD, PhD, DSc, professor, head of the department of gastroenterology, Academician Yu. E. Veltishchev Research and Clinical Institute of Pediatrics

125412, Moscow, Taldomskaya str, 2