1. Department of Obstetrics, Gynecology, and Reproductive Sciences, School of Medicine, University of Pittsburgh, PA, USA
2. Department of Clinical Analytics, University of Pittsburgh Medical Centers, PA, USA
3. Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, PA, USA
4. Department of Pharmaceutical Science, School of Pharmacy, University of Pittsburgh, PA, USA
5. Department of Pathology, University of Pittsburgh, PA, USA
6. Departments of Pediatrics and Epidemiology, Biostatistics and Occupational Health, McGill University, Quebec, Canada