TY  - RPRT
TI  - Modelling clustered survival data from multicentre clinical trials.
AU  - David V Glidden
AU  - Eric Vittinghoff
PY  - 2004
DO  - 10.1002/sim.1599
UR  - https://pubmed.ncbi.nlm.nih.gov/14748034/
ID  - 14748034
ER  -