Affiliation: | 1. Departments of Obstetrics and Gynecology, University of Southern California. School of Medicine and Women's Hospital, Los Angeles County/USC Medical Center, Los Angeles, California, U.S.A;2. Department of Pathology University of Southern California. School of Medicine and Women's Hospital, Los Angeles County/USC Medical Center, Los Angeles, California, U.S.A;3. Department of Pediatrics, University of Southern California, School of Medicine and Women's Hospital, Los Angeles County/USC Medical Center, Los Angeles, California, U.S.A Department of Pediatrics Children's Hospital of Los Angeles, USC School of Medicine, Los Angeles, U.S.A |