University of Pittsburgh-Magee Womens Hospital, Pittsburgh, Pennsylvania, United States
Christiana Care, Newark, Delaware, United States
Duke University Medical Center, Durham, North Carolina, United States
Univerity of Pittsburgh Magee-Womens Hospital, Pittsburgh, Pennsylvania, United States
High Risk Obstetrical Consultants, Knoxville, Tennessee, United States
University of Utah, Salt Lake City, Utah, United States
Northwestern University, Chicago, Illinois, United States
University of Texas Medical Branch, Galveston, Texas, United States