1. Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco2Department of Epidemiology and Biostatistics, University of California, San Francisco3The Medical Effectiveness Research Center for Diverse Population
2. Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco
3. The Medical Effectiveness Research Center for Diverse Populations, University of California, San Francisco4Department of Medicine, University of California, San Francisco
4. Department of Obstetrics and Gynecology, Santa Clara Valley Medical Center, San Jose,California
5. Department of Obstetrics and Gynecology, Oregon Health and Science University, Portland
6. La Clínica de la Raza, Oakland, California
7. Alameda County Health System