Affiliation: | 1. Department of Respiratory Medicine, Okayama University Hospital, 2-5-1, Shikata-cho, Kitaku, Okayama, 700-8558, Japan 2. Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan 3. Department of Respiratory Medicine, Kurashiki Central Hospital, Okayama, Japan 4. Division of Epidemiology and Prevention, Aichi Cancer Center Research Institute, Aichi, Japan 5. Department of General Internal Medicine 4, Kawasaki Hospital, Kawasaki Medical School, Okayama, Japan
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