Department of Obstetrics and Gynecology, Michigan Medicine, University of Michigan, Ann Arbor, MI

Reprint requests to: Hope K. Haefner, MD, University of Michigan, L4113 UH South, 1500 E. Medical Center Dr., SPC 5276, Ann Arbor, Michigan 48109-5276. E-mail: [email protected]

The author has declared that there are no conflicts of interest.