1. Department of Childhood Diseases, Sechenov First Moscow State Medical University, Moscow 119435, Russia
2. Department of Polyclinic and Emergency Pediatrics, Pirogov Russian National Research Medical University, Moscow 117997, Russia
3. Children’s Medical Center, Main Medical Department of the Presidential Administration of the Russian Federation, Moscow 109012, Russia
4. Department of Childhood Diseases No. 3, Astana Medical University, Astana 010000, Kazakhstan
5. Department of General Medical Practice No. 3, Karaganda Medical University, Karaganda 100008, Kazakhstan
6. Department of Pediatrics, Kazakh Medical University of Continuing Education, Almaty 050040, Kazakhstan