22.7 Restricted Median Survival Time (RMST)
https://cran.r-project.org/web/packages/simtrial/vignettes/rmst.html https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9081686/
https://cran.r-project.org/web/packages/simtrial/vignettes/rmst.html https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9081686/