[1] UNIV CALIF LOS ANGELES,DEPT MICROBIOL,LOS ANGELES,CA 90024
[2] UNIV CALIF LOS ANGELES,HOWARD HUGHES MED INST,LOS ANGELES,CA 90024
[3] UNIV NEW MEXICO,CTR CANC,DEPT CELL BIOL & PATHOL,ALBUQUERQUE,NM 87131
[4] UNIV TENNESSEE,ST JUDE CHILDRENS RES HOSP,COLL MED,MEMPHIS,TN 38101
[5] UNIV ALABAMA,MED GENET LAB,BIRMINGHAM,AL 35233
[6] PEDIAT ONCOL GRP,ST LOUIS,MO 63108