TY  - RPRT
TI  - Controlled clinical trials: an ethical imperative?
AU  - W J Mackillop
AU  - P A Johnston
PY  - 1987
DO  - 10.1016/0021-9681(87)90053-1
UR  - https://pubmed.ncbi.nlm.nih.gov/3558711/
ID  - 3558711
ER  -