Affiliation: | 1. National Institute for Medical Research, The Ridgeway, Mill Hill, London. NW7 lAA;2. Searle Research Group, Department of Biochemistry, Oxford University, Oxford. OXl 3QU;1. Department of Radiotherapy, National Institute of Oncology, Ráth Gy. u. 7-9, Budapest H-1122, Hungary;2. Department of Pathology, National Institute of Oncology, Budapest, Hungary;3. Department of Surgery, National Institute of Oncology, Budapest, Hungary |