1 Department of Obstetrics and Gynecology, Graduate School of Medicine, University of Tennessee Health Science Center, Knoxville, TN.
2 School of Kinesiology, Recreation, and Sport, Western Kentucky University, Bowling Green, KY.
3 Department of Obstetrics and Gynecology, Graduate School of Medicine, University of Tennessee Health Science Center, Knoxville, TN.
4 Mayo Clinic Division of Maternal-Fetal Medicine, Rochester, MN.
5 Department of Obstetrics and Gynecology, Graduate School of Medicine, University of Tennessee Health Science Center, Knoxville, TN.
6 Department of Obstetrics and Gynecology, Graduate School of Medicine, University of Tennessee Health Science Center, Knoxville, TN. Electronic address: [email protected].