TY  - RPRT
TI  - Subgroup analysis in clinical trials.
AU  - David I Cook
AU  - Val J Gebski
AU  - Anthony C Keech
PY  - 2004
DO  - 10.5694/j.1326-5377.2004.tb05928.x
UR  - https://pubmed.ncbi.nlm.nih.gov/15012568/
ID  - 15012568
ER  -