1. Postgraduate Programme “Maternal Fetal Medicine”, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
2. Second Department of Obstetrics and Gynecology, “Aretaieion” Hospital, Faculty of Medicine, National and Kapodistrian University of Athens, 11528 Athens, Greece
3. Department of Pediatric Surgery, “Agia Sofia” Children’s Hospital, 11527 Athens, Greece
4. Department of Pathology, “Agia Sofia” Children’s Hospital, 11527 Athens, Greece