Penn Family Planning and Pregnancy Loss Center, Penn Medicine, University of Pennsylvania, Perelman School of Medicine, 1000 Courtyard, 3400 Spruce Street, Philadelphia, PA 19104, United States
Department of Biostatistics and Epidemiology, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Perelman School of Medicine, United States
Department of Biostatistics and Epidemiology, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Perelman School of Medicine, United States