1 Department of Pediatrics, University of Pennsylvania Perelman School of Medicine/Children's Hospital of Philadelphia, Philadelphia, Pennsylvania. Electronic address: fordc@chop.edu.
2 Department of Pediatrics, Harvard Medical School/Boston Children's Hospital, Boston, Massachusetts.
3 Department of Pediatrics, University of California at San Francisco/Benioff Children's Hospitals, San Francisco, California.
4 Center for Adolescent Health & the Law, Chapel Hill, North Carolina.
5 Department of Pediatrics, University of Washington/Seattle Children's Hospital, Seattle, Washington.
6 Department of Pediatrics, University of Southern California/Children's Hospital of Los Angeles, Los Angeles, California.
7 Department of Medical Informatics, University of Minnesota/Fairview Health System, Eagan, Minnesota.
8 School of Nursing and Department of Pediatrics, University of Minnesota, Minneapolis, Minnesota.
9 Department of Pediatrics, University of Alabama at Birmingham School of Medicine, Birmingham, Alabama.
10 Department of Pediatrics, University of Pennsylvania Perelman School of Medicine/Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.