The use and usefulness of placebo controls.
Ramsay
D S
DS
Woods
S C
SC
D000978:Antiparkinson Agents / Q000627:therapeutic use; D003214:Conditioning, Classical; D018849:Controlled Clinical Trials as Topic; D004298:Dopamine / Q000378:metabolism; D006801:Humans; D010300:Parkinson Disease / Q000188:drug therapy; D015990:Placebo Effect; D010919:Placebos
D000978:Antiparkinson Agents; D010919:Placebos; D004298:Dopamine