1. World Health Organization. Coronavirus disease (COVID-19) outbreak, 2020 [cited 2020 Feb 26]. https://www.who.int/emergencies/diseases/novel-coronavirus-2019
2. Ministry of Health. Labour and Welfare, Japan. Regarding COVID-19 cases on a cruise ship, 2020 Feb 26 [in Japanese] [cited 2020 Feb 26]. https://www.mhlw.go.jp/stf/houdou/houdou_list_202002.html
3. Ministry of Health. Labour and Welfare, Japan. Cabinet order to designate novel coronavirus infection 2019 as designated infectious disease, 2020 Jan 28 [in Japanese] [cited 2020 Feb 26]. https://www.mhlw.go.jp/content/10900000/000589747.pdf
4. Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China.;Huang;Lancet,2020
5. Epidemiological and clinical characteristics of 99 cases of 2019 novel coronavirus pneumonia in Wuhan, China: a descriptive study.;Chen;Lancet,2020