1. Department of Obstetrics and Gynecology, Northwestern University, Chicago, Illinois
2. Department of Obstetrics and Gynecology, Northwestern University, Chicago, Illinois2Departments of Preventive Medicine and Medical Social Sciences, Northwestern University, Chicago, Illinois
3. Department of Obstetrics, Gynecology, and Reproductive Biology, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts4Planned Parenthood League of Massachusetts, Boston