TY  - RPRT
TI  - Underpowered studies.
AU  - R Lilford
AU  - A J Stevens
PY  - 2002
DO  - 10.1046/j.0007-1323.2001.01989.x
UR  - https://pubmed.ncbi.nlm.nih.gov/11856122/
ID  - 11856122
ER  -