[1] WENNER GREN INST, DEPT IMMUNOL, S-10691 STOCKHOLM, SWEDEN
[2] RES INST CLIN & EXPTL ONCOL, CS-60200 BRNO, CZECHOSLOVAKIA
[3] KOBENHAVNS AMTSSYGEHUS, DEPT UROL, DK-8000 HERLEV, DENMARK
[4] FIBIGER LAB, DK-2100 COPENHAGEN, DENMARK
[5] CHARLES UNIV, FAC MED, INST BIOPHYS & NUCL MED, CS-12000 PRAGUE 2, CZECHOSLOVAKIA
[6] HVIDOVRE HOSP, DEPT UROL, DK-2650 HVIDOVRE, DENMARK
[7] FINSEN INST, DEPT PATHOL, DK-2100 COPENHAGEN, DENMARK
[8] INST HYG & EPIDEMIOL, CS-10042 PRAGUE 10, CZECHOSLOVAKIA