1. 1) 厚生労働省「がん対策推進基本計画中間評価報告書(第3期」https://www.mhlw.go.jp/stf/shingi2/0000089153_00001.html
2. 2) 厚生労働省「令和4年人口動態統計(確定数)」http://www.mhlw.go.jp/toukei/saikin/hw/jinkou/geppo/nengai22/index.html
3. 3) 国立がん研究センターがん情報サービス「がん統計」(全国がん登録)
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5. 5) Probert, C.S., Ahmed, I., Khalid, T., Johnson, E., Smith, S., Ratcliffe, N. : Volatile organic compounds as diagnostic biomarkers in gastrointestinal and liver diseases, J Gastrointestin Liver Dis, 18 (3), 337-343, 2009.