1 Department of Family Medicine, Obstetrics and Gynecology, University of Michigan, 1018 Fuller Street, Ann Arbor, MI 48104, USA. Electronic address: diane.m.harper@gmail.com.
2 Family Medicine, Obstetrics and Gynecology, University of Washington, 4311 11th Avenue Northeast, Suite 210, Box 354982, Seattle, WA 98105, USA. Electronic address: godfreye@uw.edu.