1. Clinical Characteristics of Coronavirus Disease 2019 in China;Guan;New England Journal of Medicine,2020
2. The rate of underascertainment of novel coronavirus (2019-nCoV) infection: Estimation using Japanese passengers data on evacuation flights;Nishiura,2020
3. The epidemiological characteristics of an outbreak of 2019 novel coronavirus diseases (COVID-19) in China;Novel CPERE;Zhonghua liu xing bing xue za zhi= Zhonghua liuxingbingxue zazhi,2020
4. Coronavirus disease 2019 (COVID-19) Situation Report – 41;WHO,2020
5. Ministry of Health, Labour and Welfare, Japan. Available from https://www.mhlw.go.jp/stf/houdou/index.html [Accessed 20th April 2020] (in Japanse)