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Streitberger, Konrad; Witte, Steffen; Mansmann, Ulrich; Knauer, Christine; Krämer, Jürgen; Scharf, Hanns-Peter; Victor, Norbert (2004): Efficacy and safety of acupuncture for chronic pain caused by gonarthrosis: a study protocol of an ongoing multi-centre randomised controlled clinical trial ISRCTN27450856. In: BMC Complementary and Alternative Medicine, Vol. 4: p. 6