| no evidence of xmrv or related retroviruses in a london hiv-1-positive patient cohort. | several studies have implicated a recently discovered gammaretrovirus, xmrv (xenotropic murine leukaemia virus-related virus), in chronic fatigue syndrome and prostate cancer, though whether as causative agent or opportunistic infection is unclear. it has also been suggested that the virus can be found circulating amongst the general population. the discovery has been controversial, with conflicting results from attempts to reproduce the original studies. | 2011 | 21448291 |