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Footnotes
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Contributors KN treated the patient and drafted the paper. NF treated the patient and drafted and revised the paper. MA, YF, KO and SO contributed to the data monitoring and drafted and revised the paper. KH first found the CT finding of the patient and analysed the patient data. KK analysed the radiological images of the patients. HT and KT contributed to the pathological examination of the patients. TK finally approved the work to be published.
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Funding This research is a part of the research and development and the dissemination projects related to the 13 fields of occupational injuries and illnesses of the Japan Labour Health and Welfare Organization.
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Competing interests None.
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Patient consent Obtained.
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Provenance and peer review Not commissioned; externally peer reviewed.