1. Center for Obesity Research and Education, Temple University School of Medicine, Philadelphia, Pennsylvania.
2. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Harvard Vanguard Medical Associates, Boston, Massachusetts.
3. Obesity Prevention Program, Department of Ambulatory Care and Prevention, Harvard Medical School and Harvard Pilgrim Health Care, Boston, Massachusetts.
4. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, Massachusetts.
5. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of North Carolina School of Medicine, Chapel Hill, North Carolina.