[1] Childrens Hosp, Med Ctr, Div Behav Med & Clin Psychol, Cincinnati, OH 45229 USA
[2] Childrens Hosp, Med Ctr, Dept Anesthesia, Cincinnati, OH 45229 USA
[3] Univ Cincinnati, Coll Med, Dept Pediat, Cincinnati, OH USA
[4] Childrens Hosp, Greenville Hosp Syst, Div Dev & Behav Pediat, Greenville, SC USA