[1] George Washington Univ, Sch Med & Hlth Sci, Childrens Natl Med Ctr, Div Adolescent & Young Adult Med,Ctr Clin & Commu, Washington, DC 20052 USA
[2] Childrens Hosp Philadelphia, Div Oncol, Philadelphia, PA 19104 USA
[3] Childrens Hosp Philadelphia, Div Clin Psychol, Philadelphia, PA 19104 USA
[4] Childrens Hosp, Div Resp Dis, Boston, MA 02115 USA
[5] Cincinnati Childrens Hosp Med Ctr, Dept Pediat, Div Adolescent Med, Cincinnati, OH USA