1. Pediatric Department, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russian Federation
2. Medical Institute, Peoples’ Friendship University of Russia (RUDN University), 117198 Moscow, Russian Federation
3. Pediatrics and Child Health Research Institute, Petrovsky National Research Centre of Surgery, 119992 Moscow, Russian Federation; Pirogov Russian National Research Medical University, 117513 Moscow, Russian Federation
4. Faculty of Informatics, Mathematics and Computer Science, Direction of Business Informatics, National Research University Higher School of Economics, 603014 Nizhny Novgorod, Russian Federation