[1] Cincinnati Childrens Hosp Med Ctr, Cincinnati Comprehens Sickle Cell Ctr, Canc & Blood Dis Inst, Dept Pediat,Div Hematol, 3333 Burnet Ave, Cincinnati, OH 45229 USA
[2] Childrens Hosp & Clin, Minneapolis, MN USA
[3] Indiana Hemophilia & Thrombosis Ctr Inc, Indianapolis, IN USA
[4] Univ Illinois, Coll Med, Childrens Hosp Illinois, OSF St Francis Med Ctr, Peoria, IL 61656 USA
[5] Sickle Cell Dis Assoc Amer, Michigan Chapter, Detroit, MI USA
[6] Med Coll Wisconsin, Childrens Hosp Wisconsin, Milwaukee, WI 53226 USA
[7] Cincinnati Childrens Hosp Med Ctr, Dept Pediat, Div Behav Med, Cincinnati, OH 45229 USA