The placebo effect revisited.
Danish Ramazzini Centre, Department of Occupational Medicine, Herning Hospital, 7400 Herning, Denmark. joande@rm.dk
Johan Hviid
JH
Andersen
Sigurd
S
Mikkelsen
D015444:Exercise; D005260:Female; D006261:Headache; D006801:Humans; D008297:Male