1 University of Tennessee Health Science Center, Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Memphis, TN, USA. ldetti@uthsc.edu.
2 Cleveland Clinic, Women's Health Institute, Department of Obstetrics and Gynecology, Cleveland, OH, USA. ldetti@uthsc.edu.
3 University of Tennessee Health Science Center, Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Memphis, TN, USA.
4 University of Tennessee Health Science Center, Division of Biostatistics, Department of Preventive Medicine, Memphis, TN, USA.
5 Cleveland Clinic, Women's Health Institute, Department of Obstetrics and Gynecology, Cleveland, OH, USA.
6 Florida International University, Department of Biostatistics, Miami, FL, USA.