Radiobiological intercomparisons of fast neutron beams used for therapy in Japan and the United States.

“Radiological Research Laboratory, College of Physicians and Surgeons, Columbia University, New York. bSection of Experimental Radiotherapy, M.D. Anderson Hospital and Tumor Institute, Houston, Texas. ‘Radiology Department, University of Washington, Seattle, Washington. d Department of Physics, M.D. Anderson Hospital and Tumor Institute, Houston, Texas. ’ Department of Biochemistry and Biophysics, The Pennsylvania State University, University Park, Pennsylvania. ‘Department of Radiology, University of California, San Francisco, California.