TY  - RPRT
TI  - Limitations of randomised controlled trials.
AU  - L P Fielding
AU  - R Grace
AU  - R Hittinger
PY  - 1995
DO  - 10.1136/bmj.310.6991.1410
UR  - https://pubmed.ncbi.nlm.nih.gov/7787571/
ID  - 7787571
ER  -