[1] UNIV ALABAMA,CTR CANC RES & TRAINING,DEPT MICROBIOL,BIRMINGHAM,AL 35294
[2] UNIV ALABAMA,CTR CANC RES & TRAINING,DEPT SURG,BIRMINGHAM,AL 35294
[3] VET ADM HOSP,BIRMINGHAM,AL 35233
[4] UPPSALA UNIV,JOSIAH MACY FDN,CTR BIOMED,DEPT IMMUNOL,S-75123 UPPSALA,SWEDEN