[1] MANITOBA CANC TREATMENT & RES FDN, MANITOBA INST CELL BIOL, WINNIPEG, MB R3E 0V9, CANADA
[2] UNIV MANITOBA, DEPT PHYSIOL, WINNIPEG, MB R3E 0V9, CANADA
[3] NCI, FREDERICK CANC RES & DEV CTR, ABL BASIC RES PROGRAM, FREDERICK, MD 21702 USA
[4] UNIV CINCINNATI, COLL MED, DEPT CELL BIOL NEUROBIOL & ANAT, CINCINNATI, OH USA
[5] KAROLINSKA INST, CTR MICROBIOL & TUMOR BIOL, S-17177 STOCKHOLM, SWEDEN