| http://www.w3.org/ns/prov#value | - However, these criteria were criticized, not only because a large number of symptoms had to be present for a diagnosis of CFS, which might bias in favor of psychiatric morbidity (Katon & Russo, 1992), but also because it excluded such conditions as anxiety and depression, which some propose to be a result of the syndrome (Ray, 1991; Van Hoof, Cluydts, & De Meirleir, 2003).Therefore, less restricti
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