An australian researching is looking into cfs testing, unsure if XMRV but am led to believe so. Also read in her bio other testing she has done, one that caught my eye was testosterone on natural killer cell function, couldnt get into it to read details, but i remember reading about aids patients taking anabolic steroids to counteract muscle wasting from the disease and found it increased cd4 lymphocyte counts which is a marker of hiv positive or ngative. After reading XMRV has cortisol receptors, drugs like testosterone and anabolic steroids have opposite effects to cortisol and can block or lower the effect of cortisol, mmmm maybe another avenue of treatment, especially for men as less side effect of these drugs then for women. Something to think about. bit more googling for me on this.