| Affiliation: | 1. Department of Obstetrics and Gynecology, University of Utah, Salt Lake City, UT;2. Epidemiology Branch, Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD;3. Department of Statistics, University of Haifa, Haifa, Israel;4. Department of Epidemiology and Environmental Health, University at Buffalo, State University of New York, Buffalo, NY;5. Department of Obstetrics and Gynecology, University of Colorado, Denver, CO;6. Department of Family, Community and Rural Health, Commonwealth Medical College, Scranton, PA;7. Department of Family and Preventive Medicine, University of Utah, Salt Lake City, UT |
