1. Department of Pediatric-Adolescent Endocrinology & Diabetes, Athens Medical Center, Athens, Greece
2. Department of Pediatrics, Division of Pediatric Endocrinology, Medical School, University of Patras, Rion, Greece
3. Neonatal Intensive Care Unit, Gaia Maternity, Athens Medical Center, Athens, Greece
4. Pediatric Urology Clinic, Athens Medical Center, Athens, Greece
5. Athens Medical Center, Athens, Greece
6. Pediatric Endocrinology Unit, 3rd Department of Pediatrics, Attikon University Hospital, Athens, Greece
7. Endocrine Unit, Second Department of Obstetrics and Gynecology, Aretaieion Hospital, Medical School, University of Athens, Athens, Greece