1. Ruprecht-Karls-University Heidelberg, University Children’s Hospital, Department of General Pediatrics, Heidelberg, Germany

2. Otto-von-Guericke University Magdeburg, Institute of Psychology, Magdeburg, Germany

3. Ukrainian Center of Endocrine Surgery and Transplantation of Endocrine Organs and Tissues, Kiev, Ukraine

4. Ukrainian Children Specialized Hospital “OHMATDIT”, Kiev, Ukraine