[1] RES INST CLIN & EXPTL ONCOL, BRNO, CZECHOSLOVAKIA
[2] IMPERIAL CANC RES FUND, MOLEC IMMUNOCHEM LAB, S MIMMS EN6 3LD, HERTS, ENGLAND
[3] UNIV OXFORD, JOHN RADCLIFFE HOSP, DEPT PATHOL, OXFORD OX3 9DU, ENGLAND
[4] JOHN RADCLIFFE HOSP, INST MOLEC MED,IMPERIAL CANC RES FUND,ONCOL UNIT, MOLEC ONCOL LAB, OXFORD OX3 9DU, ENGLAND