[1] IST NAZL RIC CANC,IMMUNOGENET LAB,I-16132 GENOA,ITALY
[2] FRED HUTCHINSON CANC RES CTR,HUMAN IMMUNOGENET PROGRAM,SEATTLE,WA 98104
[3] UNIV MANCHESTER,ARC,EPIDEMIOL RES UNIT,MANCHESTER M13 9PT,LANCS,ENGLAND
[4] UNIV TUBINGEN,MED KLIN,TRANSPLANTAT IMMUNOL & IMMUNOHAEMATOL SECT,W-7400 TUBINGEN 1,GERMANY