[1] UNIV ALABAMA,DEPT MED,UNIV STN,BIRMINGHAM,AL 35294
[2] UNIV ALABAMA,DEPT MICROBIOL,BIRMINGHAM,AL 35294
[3] UNIV ALABAMA,DEPT BIOCHEM,BIRMINGHAM,AL 35294
[4] HOSP UNIV PENN,DEPT MED,HEMATOL & ONCOL SECT,PHILADELPHIA,PA 19104
[5] NCI,TUMOR CELL BIOL LAB,BETHESDA,MD 20895