[1] Huntsman Canc Inst, Canc Control & Populat Sci, Salt Lake City, UT 84112 USA
[2] Univ Utah, Dept Dermatol, Salt Lake City, UT 84112 USA
[3] Childrens Natl Med Ctr, Div Psychol & Behav Hlth, Washington, DC 20010 USA
[4] George Washington Univ, Sch Med, Dept Pediat, Washington, DC 20052 USA
[5] Univ Washington, Dept Pediat, Seattle, WA 98195 USA
[6] Seattle Childrens Hosp, Seattle, WA USA
[7] Georgetown Lombardi Comprehens Canc Ctr, Washington, DC USA