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Ohyama, Y., Naganuma, H., Ishida, H. et al. Portal vein gas in a patient with acute cholangitis: report of a case with emphasis on B-flow imaging. J Med Ultrasonics 49, 107–108 (2022). https://doi.org/10.1007/s10396-021-01167-2
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DOI: https://doi.org/10.1007/s10396-021-01167-2