1. 1) Ministry of Health, Labour and Welfare. “Atarashii seikatsuyoushiki no jissenrei.”: 〈https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/0000121431_newlifestyle.html〉, cited 4 May, 2020.
2. 2) Japanese Society of Phlebology. “Press Release Hodo kikan no minasama e zaitaku no minasama eno economy class shokogun nitsuite no chuikeihatsu no onegai.”: 〈https://js-phlebology.jp/wp/wp-content/uploads/2020/04/%e3%80%90%e6%97%a5%e6%9c%ac%e9%9d%99%e8%84%88%e5%ad%a6%e4%bc%9a%e3%80%9120200428%e5%a0%b1%e9%81%93%e6%a9%9f%e9%96%a2%e6%a7%98%e3%81%b8%e3%81%ae%e3%81%94%e4%be%9d%e9%a0%bc.pdf〉, cited 28 April, 2020.
3. 3) Iwata H., Kaibara M., Jpn. J. Thromb. Hemosti., 13, 279–283 (2002).
4. 4) Japanese Circulation Society. “Guidelines for Diagnosis, Treatment and Prevention of Pulmonary Thromboembolism and Deep Vein Thrombosis (JCS 2017).”: 〈https://www.j-circ.or.jp/cms/wp-content/uploads/2017/09/JCS2017_ito_h.pdf〉, cited 23 March, 2018.
5. 5) Ministry of Health, Labour and Welfare. “Ekonomi Kurasu Shokogun no Yobou no Tameni.”: 〈https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/0000170807.html〉, cited 10 July, 2017.