1. Department of Obstetrics and Gynecology, Medical School, University of Crete, Heraklion, Greece
2. Department of Obstetrics and Gynecology, Medical School, University of Ioannina, Ioannina, Greece
3. 1st Department of Pediatrics and Choremion Laboratory, Medical School, University of Athens, Athens, Greece
4. 2nd Department of Obstetrics and Gynecology, Medical School, University of Athens, Athens, Greece