TY  - RPRT
TI  - Spine stats. The Cox regression analysis.
AU  - J A Finkelstein
AU  - H Kreder
DO  - 10.1016/s1529-9430(01)00140-1
UR  - https://pubmed.ncbi.nlm.nih.gov/14588322/
ID  - 14588322
ER  -