[1] Blood Ctr Wisconsin, Blood Res Inst, Milwaukee, WI 53226 USA
[2] Nanjing Univ, State Key Lab Pharmaceut Biotechnol, Nanjing 225001, Peoples R China
[3] Med Coll Wisconsin, Dept Microbiol & Mol Genet, Milwaukee, WI 53226 USA
[4] Med Coll Wisconsin, Dept Pediat, Milwaukee, WI 53226 USA
[5] Med Coll Wisconsin, Childrens Hosp Wisconsin, Dept Pathol & Lab Med, Milwaukee, WI 53226 USA