[1] Childrens Hosp Philadelphia, Appl Clin Res Ctr, 2716 South St,Suite 11-473, Philadelphia, PA 19146 USA
[2] Temple Univ, Coll Publ Hlth, Philadelphia, PA 19122 USA
[3] Univ Southern Calif, Ctr Econ & Social Res, Los Angeles, CA USA
[4] Univ Med Ctr Hamburg Eppendorf, Dept Child & Adolescent Psychiat Psychotherapy &, Hamburg, Germany
[5] GlaxoSmithKline Upper Providence, Value Evidence & Outcomes, Collegeville, PA USA
[6] Cincinnati Childrens Hosp Med Ctr, James M Anderson Ctr Hlth Syst Excellence, Cincinnati, OH 45229 USA