A paper entitled “Relative biological effectiveness of neutrons derived from the excess relative risk model with the atomic bomb survivors data managed by Hiroshima University (広島大学が保管する原爆被爆者のデータから導出した過剰相対リスクに基づく生物学的効果比)” written by Dr. Sato, Prof. Yasuda, et al was published in the Radiation Protection Dosimetry journal. This paper suggested that the value of neutrons’ relative biological effectiveness (RBE) derived from the A-bomb survivors’ data would be larger than that estimated previously.