title: [No therapy works without ritual].
authors.forename: Burkhard
authors.initials: B
authors.lastname: Dresen
mesh_terms: D015670:Acupuncture Therapy; D018771:Arthralgia / Q000628:therapy; D002562:Ceremonial Behavior; D006801:Humans; D020370:Osteoarthritis, Knee / Q000628:therapy*; D016032:Randomized Controlled Trials as Topic