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[2] INST NACL ENFERMEDADES NEOPLAS, LIMA, PERU
[3] ACAD MED SCI USSR, ONCOL RES CTR, MOSCOW 109801, USSR
[4] INST ONCOL, PL-44100 GLIWICE, POLAND
[5] INST ONCOL, PL-02034 WARSAW, POLAND
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[7] NN PETROV ONCOL RES INST, LENINGRAD 188646, USSR
[8] INST GUSTAVE ROUSSY, F-94800 VILLEJUIF, FRANCE
[9] HET NEDERLANDS KANKERINST, AMSTERDAM, NETHERLANDS
[10] FONDAZIONE PASCALE, NAPLES, ITALY
[11] ONCOL INST, BRNO, CZECHOSLOVAKIA
[12] STATE INST ONCOL, BUDAPEST, HUNGARY
[13] NORWEGIAN RADIUM HOSP, OSLO, NORWAY
[14] ONCOL RES INST, SOFIA, BULGARIA
[15] ONCOL INST, Krakow, POLAND
[16] HOSP AC CAMARGO, Sao Paulo, BRAZIL
[17] INST JULES BORDET, B-1000 BRUSSELS, BELGIUM