Barnhart Kurt T, Legro Richard S, Scott Richard T
Department of Obstetrics and Gynecology, Department of Biostatistics and Epidemiology, and Women's Health Clinical Research Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania.
Department of Obstetrics and Gynecology, Penn State College of Medicine, Hershey, Pennsylvania.
Fertil Steril. 2018 Jan;109(1):44-47. doi: 10.1016/j.fertnstert.2017.11.034.