1. Department of Medical Surgical Sciences; Division of Obstetrics and Prenatal Medicine; St Orsola Malpighi Hospital; University of Bologna; Bologna Italy
2. Department of Neuroscience, Reproductive Sciences and Dentistry; School of Medicine; University of Naples Federico II; Naples Italy
3. Department of Hematology and Medical Oncology; Dana-Farber Cancer Institute; Boston Massachusetts USA
4. Department of Hematology; Massachusetts General Hospital; Boston Massachusetts USA
5. Department of Obstetrics and Gynecology; Division of Maternal-Fetal Medicine; Thomas Jefferson University Hospital; Philadelphia Pennsylvania USA