Institution: | 1. Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, Pennsylvania, USA;2. Midwifery Institute of Philadelphia University, Pennsylvania, USA;3. Department of Obstetrics, Gynecology & Reproductive Sciences, University of Pittsburgh, Pennsylvania, USA;4. Department of Clinical and Translational Research, University of Pittsburgh, Pennsylvania, USA;5. Magee‐Womens Research Institute, Pittsburgh, Pennsylvania, USA |