[1] Temple Univ, Coll Publ Hlth, 1913 N Broad St 201A, Philadelphia, PA 19122 USA
[2] Childrens Hosp Philadelphia, Appl Clin Res Ctr, Philadelphia, PA 19104 USA
[3] GlaxoSmithKline, Value Evidence & Outcomes Patient Ctr Outcomes, Collegeville, PA USA
[4] Univ Cincinnati, Coll Med, Dept Pediat, Cincinnati Childrens Hosp Med Ctr, Cincinnati, OH USA
[5] Univ Cincinnati, Dept Psychol, Coll Arts & Sci, Cincinnati, OH 45221 USA
[6] Univ Penn, Perelman Sch Med, Philadelphia, PA 19104 USA