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. 2014 Feb 7;4(2):e003973. doi: 10.1136/bmjopen-2013-003973

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Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions

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Model C: evaluation design with indirect comparisons of prevalence estimates from several case definitions applied on different populations (CFS, chronic fatigue syndrome; ME, myalgic encephalomyelitis).