1. A. Getlik Clinic for Children and Adolescents, Slovak Medical University and University Hospital; St. Elizabeth University of Health and Social Sciences; National Pirogov Memorial Medical University
2. National Pirogov Memorial Medical University; Department of Anesthesiology, Intensive Care Unit and Pain Medicine, Vinnytsya Regional Clinical Endocrinology Center
3. National Pirogov Memorial Medical University
4. Slovak Medical University, 1st Department of Surgery, Faculty of Medicine, SMU and UNB, Children's Hospital