TY  - RPRT
TI  - Randomised controlled trials and retrospective controls.
AU  - R Doll
AU  - R Peto
PY  - 1980
DO  - 10.1136/bmj.280.6206.44
UR  - https://pubmed.ncbi.nlm.nih.gov/7357264/
ID  - 7357264
ER  -