TY  - RPRT
TI  - Difficulty with MEDLINE searches for randomised controlled trials.
AU  - C E Adams
AU  - C Lefebvre
AU  - I Chalmers
PY  - 1992
DO  - 10.1016/0140-6736(92)93329-l
UR  - https://pubmed.ncbi.nlm.nih.gov/1357327/
ID  - 1357327
ER  -