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Ishiwata K, Ido T, Nakajima T, Ohrui H, Kijima-Suda I, Itoh M.Ishiwata K, et al. Among authors: itoh m.Int J Rad Appl Instrum B. 1990;17(4):363-7. doi: 10.1016/0883-2897(90)90102-7.Int J Rad Appl Instrum B. 1990.PMID: 2387744