University of Utah - Department of Obstetrics and Gynecology, RTI International, Yale University, University of Pittsburgh, Oregon Health and Science University, Northwestern University, Case Western Reserve University, Indiana University, University of Pittsburgh, University of Pennsylvania, Columbia University, University of South Florida, University of California, Irvine, Johns Hopkins University, Indiana University, University of Texas Medical Branch-Galveston, Northwestern University, Harvard University - Brigham and Women's Hospital, RTI International and Independent