[1] Univ Penn, Dept Pediat, Abramson Res Ctr, Childrens Hosp Philadelphia,Perelman Sch Med, 316D,3615 Civic Ctr Blvd, Philadelphia, PA 19104 USA
[2] Emory Univ, Transfus Tissue & Apheresis, Childrens Healthcare Atlanta, Sch Med, 7105B Woodruff Mem Bldg,101 Woodruff Circle, Atlanta, GA 30322 USA
[3] Emory Univ, Grady Hlth Syst Transfus Serv, Dept Clin Pathol, Sch Med, 7105B Woodruff Mem Bldg,101 Woodruff Circle, Atlanta, GA 30322 USA
[4] Emory Univ, Grady Hlth Syst Transfus Serv, Dept Pediat Hematol, Sch Med, 7105B Woodruff Mem Bldg,101 Woodruff Circle, Atlanta, GA 30322 USA