[1] UNIV CALIF LOS ANGELES,DEPT MICROBIOL,LOS ANGELES,CA 90024
[2] UNIV CALIF LOS ANGELES,INST MOLEC BIOL,LOS ANGELES,CA 90024
[3] ST JUDE CHILDRENS RES HOSP,DEPT HEMATOL ONCOL,MEMPHIS,TN 38101
[4] UNIV TENNESSEE,CTR HLTH SCI,COLL MED,DEPT PEDIAT,MEMPHIS,TN 38163
[5] UNIV CALIF LOS ANGELES,CTR HLTH SCI,DEPT MED,DIV HEMATOL ONCOL,LOS ANGELES,CA 90024