A workshop on multiple primary neoplasms was sponsored by the U.S.-Japan Cooperative Cancer Program, February 17 to 18, 1983, in Oiso, Japan.
Participants were: Kaoru Abe, National Cancer Center, Tokyo, Japan; Satoshi Ebihara, National Cancer Center, Tokyo, Japan; Hirota Fujiki, National Cancer Center, Tokyo, Japan; Curtis C. Harris, National Cancer Institute, Bethesda, Md.; Frederick Hecht, Southwest Biomedical Research Institute, Tempe, Ariz.; Toru Ise, National Cancer Center, Tokyo, Japan; Barbara Kaiser-McCaw Hecht, Southwest Biomedical Research Institute, Tempe, Ariz.; Fujio Kasumi, Cancer Institute Hospital, Tokyo, Japan; Kenneth J. Kopecky, Radiation Effect Research Foundation, Hiroshima, Japan; Martin Lipkin, Memorial Sloan-Kettering Cancer Center, New York, N. Y.; Robert W. Miller, National Cancer Institute, Bethesda, Md.; Nicholas Petrakis, University of California School of Medicine, San Francisco, Calif.; Shigeaki Sato, National Cancer Center, Tokyo, Japan; R. Neil Schimke, University of Kansas, Kansas City, Kans.; Yukio Shimosato, National Cancer Center, Tokyo, Japan; Keiichi Suemasu, National Cancer Center, Tokyo, Japan; Takashi Sugimura, National Cancer Center, Tokyo, Japan; Masaaki Terada, National Cancer Center, Tokyo, Japan; Ryosuke Tsuchiya, National Cancer Center, Tokyo, Japan; Arthur C. Upton, New York University, New York, N. Y.; Kyosuke Ushio, National Cancer Center, Tokyo, Japan; Toshiro Wakabayashi, Radiation Effect Research Foundation, Hiroshima, Japan; Shaw Watanabe, National Cancer Center, Tokyo, Japan; Kazumasa Yamada, Nagoya University, Nagoya, Japan; and Tsutomu Yamamoto, Radiation Effect Research Foundation, Hiroshima, Japan.