TY  - RPRT
TI  - Correcting for selection using frailty models.
AU  - Anne Vingaard Olesen
AU  - Erik Thorlund Parner
PY  - 2006
DO  - 10.1002/sim.2298
UR  - https://pubmed.ncbi.nlm.nih.gov/16252271/
ID  - 16252271
ER  -