A. N. Zavyalova
St. Petersburg State Pediatric Medical University
Russian Federation

Anna N. Zavyalova – Cand. Sc. (Med.), Associate Professor at the Department of Propedeutics of Childhood Diseases, Associate Professor at the Department of General Medical Practice, Clinical Nutritionist.

Litovskaya str. 2, Saint Petersburg 194100

D. A. Lebedev
St. Petersburg State Pediatric Medical University
Russian Federation

Dmitry A. Lebedev – Cand. Sc. (Med.), Docent, Pediatric Urologist-Andrologist, Associate Professor at the Department of Urology.

Litovskaya str. 2, Saint Petersburg 194100

V. P. Novikova
St. Petersburg State Pediatric Medical University
Russian Federation

Valeriya P. Novikova – Dr. Sc. (Med.), Professor, Head of the Department of Propedeutics of Childhood Diseases, Head of the Laboratory of Medical and Social Problems in Pediatrics.

Litovskaya str. 2, Saint Petersburg 194100

N. N. Smirnova
Pavlov First Saint Petersburg State Medical University
Russian Federation

Nataliia N. Smirnova – Dr. Sc. (Med.), Professor, Head of the Department of Pediatrics.

Lva Tolstogo str. 6-8, Saint Petersburg 197022

L. A. Firsova
St. Petersburg State Pediatric Medical University
Russian Federation

Liudmila A. Firsova – Student, Faculty of Pediatrics.

Litovskaya str. 2, Saint Petersburg 194100