title: Lessons to be learned from placebo groups in clinical trials.
authors: University of Marburg, Department of Psychology, Gutenbergstrasse 18, D-35032 Marburg, Germany.
authors: Winfried
authors: W
authors: Rief
mesh_terms: D000698:Analgesia / Q000379:methods*; D003929:Diabetic Neuropathies / Q000188:drug therapy*; D005356:Fibromyalgia / Q000188:drug therapy*; D006801:Humans; D015990:Placebo Effect