TY  - RPRT
TI  - Logical limits of randomized controlled trials.
AU  - J W Sleigh
PY  - 1997
DO  - 10.1046/j.1365-2753.1997.00068.x
UR  - https://pubmed.ncbi.nlm.nih.gov/9276590/
ID  - 9276590
ER  -