TY  - RPRT
TI  - Meta-analysis of randomized trials: looking back and looking ahead.
AU  - S Yusuf
PY  - 1997
DO  - 10.1016/s0197-2456(97)00052-4
UR  - https://pubmed.ncbi.nlm.nih.gov/9408721/
ID  - 9408721
ER  -