TY  - RPRT
TI  - Microcomputer-assisted multivariate survival data analysis using Cox's proportional hazards regression model.
AU  - N Campos-Filho
AU  - E L Franco
PY  - 1990
DO  - 10.1016/0169-2607(90)90054-d
UR  - https://pubmed.ncbi.nlm.nih.gov/2335079/
ID  - 2335079
ER  -