1. Unit of Hematology for Rare Diseases of the Blood and Blood-forming Organs; Laboratory for Molecular Diagnosis of Rare Diseases; Hospital Villa Sofia Cervello; Palermo Italy
2. Unit of Prenatal Diagnosis; Hospital Villa Sofia Cervello; Palermo Italy
3. Laboratory of Cytogenetics; Hospital Villa Sofia Cervello; Palermo Italy
4. Harris Birthright Research Center for Fetal Medicine; King's College; London UK
5. Obstetrics and Gynecology; Ioannina University Hospital; Ioannina Greece