title: [What makes the demonstration of the validity of acupuncture so difficult?].
authors.affiliation: Klinik für Anästhesiologie, Universitätsklinikum Mainz. usnickel@web.de
authors.forename: U
authors.initials: U
authors.lastname: Nickel
mesh_terms: D026881:Acupuncture / Q000379:methods; D006801:Humans; D059408:Pain Management; D015203:Reproducibility of Results