1. Department of Internal Medicine, University Medical Center, Astana, KAZAKHSTAN
2. Department of Pediatrics, University Medical Center, Astana, KAZAKHSTAN
3. Department of Biomedical Sciences, School of Medicine, Nazarbayev University, Astana, KAZAKHSTAN
4. Department of Ophthalmology, Kazakh National Medical University named after S. D. Asfendiyarov, Almaty, KAZAKHSTAN
5. Department of Internal Medicine, Municipal Children’s Hospital №2, Astana, KAZAKHSTAN
6. Family Medicine Clinic, West Kazakhstan Marat Ospanov Medical University, Aktobe, KAZAKHSTAN
7. Regional Children’s Hospital, Shymkent, KAZAKHSTAN
8. Department of Medicine, School of Medicine, Nazarbayev University, Astana, KAZAKHSTAN