Affiliation: | a Department of Obstetrics and Gynecology, Women's and Children's Hospital, Los Angeles County-University of Southern California Medical Center, Los Angeles, CA 2 Department of Pathology, Women's and Children's Hospital, Los Angeles County-University of Southern California Medical Center, Los Angeles, CA c Department of Pediatrics, Women's and Children's Hospital, Los Angeles County-University of Southern California Medical Center, Los Angeles, CA |