1 Department of Obstetrics and Gynecology, Women and Infants Hospital/Brown University (Drs. Huang and Foley), Providence, Rhode Island.
2 The Warren Alpert Medical School of Brown University (Ms. Sastry), Providence, Rhode Island.
3 Department of Obstetrics and Gynecology, Women and Infants Hospital/Brown University (Drs. Huang and Foley), Providence, Rhode Island. Electronic address: cefoley@kentri.org.