1. Center for Clinical Trials and Evidence Synthesis, Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
2. Center for Evidence Synthesis in Health, Department of Health Services, Policy, and Practice, Brown University School of Public Health, Providence, Rhode Island
3. Departments of Emergency Medicine and Pediatrics, Brown University Warren Alpert Medical School, Providence, Rhode Island
4. Department of Medicine, Department of Obstetrics and Gynecology, Brown University Warren Alpert Medical School, Providence, Rhode Island
5. Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor
6. Center for Outcomes Research and Evaluation, Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
7. Department of Epidemiology, Brown University School of Public Health, Providence, Rhode Island
8. Department of Obstetrics and Gynecology, University of North Carolina School of Medicine, Chapel Hill