1. University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
2. Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
3. Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
4. Center for Health Equity Research and Promotion (CHERP), Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, Pennsylvania, USA.
5. RAND Corporation, Pittsburgh, Pennsylvania, USA.
6. Division of Adolescent and Young Adult Medicine, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA.
7. Department of Obstetrics, Gynecology & Reproductive Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.