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Efficacy of acupuncture for chronic knee pain: protocol for a randomised controlled trial using a Zelen design

Rana S Hinman*, Paul McCrory, Marie Pirotta, Ian Relf, Kay M Crossley, Prasuna Reddy, Andrew Forbes, Anthony Harris, Ben R Metcalf, Mary Kyriakides, Kitty Novy and Kim L Bennell

BMC Complementary and Alternative Medicine 2012, 12:161  doi:10.1186/1472-6882-12-161

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