[1] ST BARTHOLOMEWS HOSP,IMPERIAL CANC RES FUND LABS,LONDON EC1A 7BE,ENGLAND
[2] UNIV MIAMI,DEPT MICROBIOL & IMMUNOL,MIAMI,FL 33101
[3] UNIV WESTERN ONTARIO,DEPT MICROBIOL & IMMUNOL,LONDON N6A 5C1,ONTARIO,CANADA
[4] NETHERLANDS CANC INST,1066 CX AMSTERDAM,NETHERLANDS
[5] UNIV TEXAS,DEPT MICROBIOL,AUSTIN,TX 78712
[6] JACKSON LAB,BAR HARBOR,ME 04609
[7] ALTON OCHSNER MED FDN & OCHSNER CLIN,NEW ORLEANS,LA 70121
[8] HAHNEMANN UNIV,DEPT MICROBIOL & IMMUNOL,PHILADELPHIA,PA 19102
[9] INSELSPITAL,LUDWIG INST CANC RES,CH-3010 BERN,SWITZERLAND
[10] SWISS INST EXPTL CANC RES,CH-1066 EPALINGES,SWITZERLAND
[11] TEXAS A&M UNIV,DEPT BIOCHEM & BIOPHYS,COLLEGE STN,TX 77843
[12] LOUISIANA STATE UNIV,MED CTR,DEPT BIOCHEM,NEW ORLEANS,LA 70112
[13] IMPERIAL CANC RES FUND LABS,LONDON WC2A 3PX,ENGLAND
[14] UNIV CALIF SAN FRANCISCO,DEPT MICROBIOL & IMMUNOL,SAN FRANCISCO,CA 94143
[15] MEM SLOAN KETTERING CANC CTR,RYE,NY 10580
[16] NCI,TUMOR IMMUNOL & BIOL LAB,BETHESDA,MD 20892