1. Departments of Physiology/Pharmacology, Obstetrics/Gynecology, Wake Forest University School of Medicine, Winston-Salem, North Carolina; Department of Physiology, Adelaide University, Adelaide, South Australia, Australia
2. Departments of Physiology/Pharmacology, Obstetrics/Gynecology, Wake Forest University School of Medicine, Winston-Salem, North Carolina; Department of Physiology, Adelaide University, Adelaide, South Australia, Australia; Department of Obstetrics and Gynecology, Wake Forest University School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157;