1 Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania; Department of Behavioral and Community Health Sciences, School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania.
2 Department of Behavioral and Community Health Sciences, School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania; Department of Pediatrics, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Division of Adolescent and Young Adult Medicine, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania.
3 Department of Pediatrics, West Virginia University School of Medicine, Morgantown, West Virginia.
4 School of Medicine, University of Washington, Seattle, Washington; Division of Adolescent Medicine, Seattle Children's Hospital, Seattle, Washington.