TY  - RPRT
TI  - "Underpowered" trials.
AU  - M Griffiths
PY  - 1997
DO  - 10.1016/s0140-6736(05)65189-6
UR  - https://pubmed.ncbi.nlm.nih.gov/9365485/
ID  - 9365485
ER  -