[1] CANC REGISTRY FINLAND,HELSINKI,FINLAND
[2] CANC REGISTRY ICELAND,REYKJAVIK,ICELAND
[3] CANC REGISTRY NORWAY,OSLO,NORWAY
[4] CANC REGISTRY SWEDEN,STOCKHOLM,SWEDEN
[5] UNIV ICELAND,DEPT PATHOL,REYKJAVIK,ICELAND
[6] NORWEGIAN RADIUM HOSP,DEPT PATHOL,OSLO,NORWAY
[7] KAROLINSKA INST,DEPT PATHOL,S-10401 STOCKHOLM 60,SWEDEN