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Yao, T., Okabe, H. A study on the roentgenologic diagnosis of the duodenal ulcer (the usefulness of the pharmaco-radiographic examination by intravenous injection of buscopan). Gastroenterol Jpn 3, 269–270 (1968). https://doi.org/10.1007/BF02777415
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DOI: https://doi.org/10.1007/BF02777415