TY  - ELEC
A1  - Therneau, T.M.
A1  - Crowson, C.
A1  - Atkinson, E.
T1  - Using time dependent covariates and time dependent coefficients in the Cox model
Y1  - 2017
UR  - http://cran.rproject.org/web/packages/survival/vignettes/timedep.pdf

ER  -