1. Department of Medical Social Sciences, Feinberg School of MedicineNorthwestern UniversityChicago Illinois
2. Arbor Research Collaborative for HealthAnn Arbor Michigan
3. Medical College of WisconsinMilwaukee Wisconsin
4. Department of Obstetrics and Gynecology, Carver College of MedicineUniversity of IowaIowa City Iowa
5. Department of BiostatisticsUniversity of MichiganAnn Arbor Michigan
6. National Institute of Diabetes and Digestive and Kidney DiseasesBethesda Maryland
7. NorthShore University Health SystemGlenview Illinois
8. Department of Obstetrics and GynecologyDuke UniversityDurham North Carolina
9. Duke University Medical CenterDurham North Carolina