former Director, and the present Director Dr. Associate Director, and to doctors Kato, LeRov Allen, Steer, Belskv, Dr. Maki, and Wada. Also in Hiroshima the Committee wishes to thank Dr. Fumio Shigeto, Director of the Hiroshima Atomic Bomb Hospital, Dr. Yutaka “4izuno, Countermeasure Section Chief at the Hiroshima Survivors Wel- fare Center, Mr. Hiroshi Suzuki, Vice Director of the Hiroshima A-bomh> Aid Home, Mr. Fazuharu Hamasaki, Director of the Hiroshima Peace Memorial Museum, and Dr. Tomin Harada, Director of the Harada Hospital. Qur special thanks is also herehy recorded for Dr. Haruo Ezaki, now Professor in the Second Surgery Department of the Hiroshima University School of Medicine, to the Committee. supervisor, Dr. for nis particiration as a consultant We are especially grateful to Dr. Naomasa Okamoto, Fzaki's former Director of the Research Institute for Nuclear Medicine and Biology of Hiroshima for allowing Dr. Ezaki to take leave from the Institute to work with the Committee. Naqasaki The Committee would like to extend its qratitude to the Honorable Yoshitake Murotani, Navor of Nagasaki City and to his Deputy Mayor Soichi Urabe for his kindness to the Committee, assistance in arranging the Committee's schedule. grateful to Dr. he are also Sadahisa Kavamoto of the Denartnent of Medicine, Atomic Bomb Casualty Commission, Dr. Yoshimasa tlatsuzaka, Director of the Nagasaki Survivors Welfare Center, of the Nagasaki A-bomb> Hosrital, Assistant to the directors the Old Age A-bomb Survivors Home, 180 1014188 and for the