| Affiliation: | 1. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Tufts-New England Medical Center, Boston, MA, USA;2. Institute for Clinical Research and Health Policy Studies, Tufts-New England Medical Center, Boston, MA, USA;3. Division of Prenatal and Special Testing, Department of Pathology, Women and Infants' Hospital, Providence, RI, USA;4. Foundation for Blood Research, Scarborough, ME, USA;5. Division of Genetics, Department of Pediatrics, Tufts-New England Medical Center, Boston, MA, USA |
