1. Physicians for Social Responsibility University of California
2. Obstetric and Pediatric Pharmacology Branch, Center for Research for Mothers and Children, NICHD, National Institutes of Health, University of California
3. Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, California
4. Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, California,