Unreliable analysis of placebo analgesia in trials of placebo pain mechanisms.
Hróbjartsson
Asbjørn
A
The Nordic Cochrane Centre, Rigshospitalet, Department 7112, Biogdamswej 9, 2100 Copenhagen, Denmark.
Gøtzsche
Peter C
PC
D000698:Analgesia / Q000379:methods*; D002986:Clinical Trials as Topic / Q000379:methods*; D006801:Humans; D059408:Pain Management; D015990:Placebo Effect