1. Hematology Division, Department of Medicine,
2. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, and
3. Center for Fetal Medicine and Prenatal Genetics, Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, MA;
4. Dana-Farber/Boston Children's Cancer and Blood Disorders Center, Harvard Medical School, Boston, MA; and
5. Center for Infertility and Reproductive Surgery, Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, MA