[1] UNIV MINNESOTA, DEPT PEDIAT, MINNEAPOLIS, MN 55455 USA
[2] UNIV MINNESOTA, DEPT LAB MED & PATHOL, MINNEAPOLIS, MN 55455 USA
[3] ST JUDE CHILDRENS RES HOSP, DEPT HEMATOL ONCOL, MEMPHIS, TN USA
[4] ST JUDE CHILDRENS RES HOSP, DEPT PATHOL & LAB MED, MEMPHIS, TN USA
[5] UNIV TENNESSEE, COLL MED, MEMPHIS, TN USA
[6] UNIV ALABAMA, MED GENET LAB, BIRMINGHAM, AL 35294 USA
[7] PEDIAT ONCOL GRP, CHICAGO, IL USA
[8] CHILDRENS CANC GRP, ARCADIA, CA USA