[1] Univ Georgia, Dept Psychol, Athens, GA 30602 USA
[2] Childrens Healthcare Atlanta, Div Pediat Gastroenterol Hepatol & Nutr, Atlanta, GA USA
[3] Emory Univ, Sch Med, Dept Pediat, Atlanta, GA USA
[4] Emory Univ, Sch Med, Dept Psychiat & Behav Sci, Atlanta, GA USA
[5] Cincinnati Childrens Hosp Med Ctr, Div Behav Med & Clin Psychol, Cincinnati, OH 45229 USA
[6] Childrens Healthcare Atlanta, Aflac Canc & Blood Disorders Ctr, Atlanta, GA USA