1 a Department of General Surgery and Medical Surgical Specialties , Obstetrics and Gynecology Unit, Policlinico G. Rodolico , University of Catania , Catania , Italy.
2 b Department of Obstetrics and Gynecology, Prenatal and Preimplantation Genetic Diagnosis, Fetal Therapy , Microcitemico Pediatric Hospital , Cagliari , Italy.