TY  - RPRT
TI  - Placebo-controlled trials: when are they needed?
AU  - D L Streiner
PY  - 1999
DO  - 10.1016/s0920-9964(98)00126-1
UR  - https://pubmed.ncbi.nlm.nih.gov/10093864/
ID  - 10093864
ER  -