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Matsushita, K., Shigematsu, I., Takahashi, T. et al. A clinicoepidemiological study on an epidemic of infectious hepatitis in Sashima district, Ibaraki prefecture (II). Gastroenterol Jpn 4, 348–349 (1969). https://doi.org/10.1007/BF02775905
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DOI: https://doi.org/10.1007/BF02775905