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Vickers, Andrew and Rees, Rebecca and Zollman, Catherine and McCarney, Rob and Smith, Claire and Ellis, Nadia and Fisher, Peter and Haselen, Robbert Van and Wonderling, David and Grieve, R. (2004) Acupuncture of chronic headache disorders in primary care: randomised controlled trial and economic analysis. Health Technology Assessment Monographs, 8 (48). pp. 1-50. ISSN 1366-5278