[1] ANTONI VAN LEEUWENHOEK HOSP,AMSTERDAM,NETHERLANDS
[2] ROTTERDAM RADIOTHERAPEUT INST,ROTTERDAM,NETHERLANDS
[3] ST RAFAEL HOSP,LOUVAIN,BELGIUM
[4] ACAD ZIEKENHUIS,NIJMEGEN,NETHERLANDS
[5] CTR FRANCOIS BACLESSE,CAEN,FRANCE
[6] CTR HENRI BECQUEREL,F-76038 ROUEN,FRANCE
[7] STATE UNIV LEIDEN HOSP,2333 AA LEIDEN,NETHERLANDS
[8] INST JULES BORDET,B-1000 BRUSSELS,BELGIUM