TY  - RPRT
TI  - Multi-state models for event history analysis.
AU  - Per Kragh Andersen
AU  - Niels Keiding
PY  - 2002
DO  - 10.1191/0962280202sm276ra
UR  - https://pubmed.ncbi.nlm.nih.gov/12040698/
ID  - 12040698
ER  -