Is the placebo powerless?
Spiegel
D
D
Kraemer
H
H
Carlson
R W
RW
D006801:Humans; D015201:Meta-Analysis as Topic; D059408:Pain Management; D015990:Placebo Effect; D010919:Placebos / Q000627:therapeutic use; D016032:Randomized Controlled Trials as Topic / Q000379:methods; D016896:Treatment Outcome
D010919:Placebos