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•• van Kuppeveld FJ, de Jong AS, Lanke KH, Verhaegh GW, Melchers WJG, Swanink CMA, Bleijenberg G, Netea MG, Galama JMD, van der Meer JWM. Prevalence of xenotropic murine leukaemia virus-related virus in patients with chronic fatigue syndrome in the Netherlands: retrospective analysis of samples from an established cohort. British Medical Journal 2010 (Accessed 25 February 2010) •• No evidence of XMRV was found. The absence of XMRV infections in Europe or differences in sample handling may contribute to the negative finding.
•• Voisset C, Weiss RA, Griffiths DJ: Human RNA “rumor” viruses: the search for novel human retroviruses in chronic disease. Microbiol Mol Biol Rev 2008, 72:157–196. This is a cautionary tale of the inference of retroviruses in human disease and the difficulties of proving cause and effect. Will XMRV become another rumor, or be conformed as causing human disease?