Department of Obstetrics and Gynecology, Sanford School of Medicine of The University of South Dakota, Sioux Falls, South Dakota

Correspondence: Keith A. Hansen, MD, Department of Obstetrics and Gynecology, Sanford School of Medicine of The University of South Dakota, Health Science Center, 1400 West 22nd Street, Sioux Falls, SD 57105. E-mail: [email protected]