1. St. John's Mercy Medical Center, Department of Obstetrics and Gynecology, 615 S. New Ballas Road, St. Louis, MO 63141-8277 USA.
2. Southern Illinois University School of Nursing, Edwardsville, Illinois.
3. Women and Newborn Services at Barnes Hospital, Washington University Medical Center, St. Louis, Missouri.
4. Jewish College of Nursing and Allied Health, Washington University Medical Center, St. Louis, Missouri.