[1] KAROLINSKA INST,DEPT MOLEC BIOL,CMB,BOX 60400,S-10401 STOCKHOLM 60,SWEDEN
[2] IST RIC FARMACOL MARIO NEGRI,DEPT MOLEC BIOL BORGOMAINERO,I-20157 MILAN,ITALY
[3] RES INST MOLEC PATHOL,A-1030 VIENNA,AUSTRIA
[4] INST INVEST BIOMED,E-28629 MADRID,SPAIN
[5] GERMAN CANC RES CTR,INST IMMUNOL & GENET,W-6900 HEIDELBERG 1,GERMANY
[6] EUROPEAN MOLEC BIOL LAB,DIFFERENTIAT PROGRAMME,W-6900 HEIDELBERG,GERMANY
[7] WEIZMANN INST SCI,DEPT CHEM IMMUNOL,IL-76100 REHOVOT,ISRAEL
[8] ROYAL MELBOURNE HOSP,LUDWIG INST CANC RES,PARKVILLE,VIC 3050,AUSTRALIA