[1] Johns Hopkins Univ, Sch Med, Dept Pathol, 600 N Wolfe St,Carnegie 446 D1, Baltimore, MD 21287 USA
[2] Bloodctr Wisconsin, Milwaukee, WI USA
[3] Emory Univ, Pathol & Pediat Ctr Transfus & Cellular Therapies, Aflac Canc Ctr, Atlanta, GA USA
[4] Emory Univ, Sch Med, Blood Disorders Serv, Atlanta, GA USA
[5] Natl Inst Hlth Clin Ctr, Bethesda, MD USA