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Y. Takeuchi, Takeshi Yamashina, N. Matsuura, Takashi Ito, M. Fujii, K. Nagai, F. Matsui, T. Akasaka, N. Hanaoka, K. Higashino, H. Iishi, R. Ishihara, H. Thorlacius, N. Uedo
World Journal of Gastrointestinal Endoscopy