Abou Ghayda R, Lee KH, Han YJ, Ryu S, et al. Estimation of global case fatality rate of coronavirus disease 2019 (COVID-19)
using meta-analyses: Comparison between calendar date and days since the outbreak
of the first confirmed case. Int J Infect Dis 2020 Aug 31. pii: S1201-9712(20)30694.
PMID: 32882434