[1] NATL CANC INST, DIV SURG ONCOL, VIA VENEZIAN 1, I-20133 MILAN, ITALY
[2] INST ONCOL, PL-44100 GLIWICE, POLAND
[3] UNIV ALABAMA, MED CTR, BIRMINGHAM, AL 35294 USA
[4] HOSP AC CAMARGO, SAO PAULO, BRAZIL
[5] NN PETROV ONCOL RES INST, LENINGRAD 188646, USSR
[6] NETHERLANDS CANC INST, 1066 CX AMSTERDAM, NETHERLANDS
[7] CHRISTIE HOSP & HOLT RADIUM INST, MANCHESTER M20 9BX, LANCS, ENGLAND
[8] INST NACL CANC, RIO DE JANEIRO, RJ, BRAZIL
[9] FDN CURIE, F-75231 PARIS 05, FRANCE
[10] THERAPEUT RADIO INST, ROTTERDAM, NETHERLANDS
[11] UNIV HOSP ZURICH, DERMATOL KLIN, CH-8091 ZURICH, SWITZERLAND
[12] GOTHENBURG UNIV, S-41124 GOTHENBURG, SWEDEN
[13] ROYAL INFIRM EDINBURGH, EDINBURGH EH3 9HB, MIDLOTHIAN, SCOTLAND
[14] NORWEGIAN RADIUM HOSP, OSLO 3, NORWAY
[15] STATE INST ONCOL, BUDAPEST, HUNGARY
[16] INST GUSTAVE ROUSSY, F-94805 VILLEJUIF, FRANCE
[17] INST JULES BORDET, B-1000 BRUSSELS, BELGIUM
[18] UNIV GLASGOW, GLASGOW G12 8QQ, SCOTLAND
[19] ONCOL RES INST, BRNO, CZECHOSLOVAKIA
[20] ONCOL RES INST, SOFIA, BULGARIA
[21] ONCOL INST, CRACOW, POLAND
[22] ONCOL INST, GENOA, ITALY
[23] INST ONCOL, BELGRADE, YUGOSLAVIA
[24] ACAD MED SCI USSR, CANC RES CTR, MOSCOW 109801, USSR
[25] MARTIN LUTHER UNIV, DDR-4010 HALLE, GER DEM REP