| Institution: | 1. Department of Family and Community Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California;2. School of Medicine, University of California, Irvine, California;3. Department of Pediatrics, University of California, Los Angeles, Los Angeles, California;4. Department of Gynecology and Obstetrics, Johns Hopkins School of Medicine, Baltimore, Maryland;5. Department of Epidemiology and Biostatistics, University of California, San Francisco, California |
