1. 1. Ministry of Health, Labor, and Welfare. Trends in domestic outbreaks of COVID-19. https://www.mhlw.go.jp/content/10906000/000760545.pdf (accessed March 27, 2021) (in Japanese)
2. 2. Worldometer. COVID-19 Coronavirus pandemic. https://www.worldometers.info/coronavirus (accessed March 27, 2021)
3. 3. Bureau of Social Welfare and Public Health. Status of the Infection. https://www.fukushihoken.metro.tokyo.lg.jp/iryo/kansen/monitoring.files/0325gurafumatome.pdf (accessed March 27, 2021) (in Japanese)
4. 4. McCabe R, Schmit N, Christen P, D'Aeth JC, Løchen A, Rizmie D, Nayagam S, Miraldo M, Aylin P, Bottle A, Perez-Guzman PN, Ghani AC, Ferguson NM, White PJ, Hauck K. Adapting hospital capacity to meet changing demands during the COVID-19 pandemic. BMC Med. 2020; 18:329.
5. 5. Litton E, Bucci T, Chavan S, Ho YY, Holley A, Howard G, Huckson S, Kwong P, Millar J, Nguyen N, Secombe P, Ziegenfuss M, Pilcher D. Surge capacity of intensive care units in case of acute increase in demand caused by COVID-19 in Australia. Med J Aust. 2020; 212:463-467.