Also: https://cran.r-project.org/web/views/Survival.html https://www.youtube.com/watch?v=1Mt7EuVJf1A http://gking.harvard.edu/files/gking/files/0s.pdf?m=1360039053 http://biostat.mc.vanderbilt.edu/wiki/pub/Main/RmS/rms.pdf --- Giorgio Garziano