ITGB2 and myalgic encephalomeyelitis/chronic fatigue syndrome: Involvement of viral dsRNA in the pathogenesis of chronic fatigue syndrome that was confirmed in the fatigue model induced by dsRNA poly (I:C) (61), and critical role of CD11b/CD18 complex in the recognition of dsRNA in immune cells (55) provide novel insights on the activity of Mac-1 complex and associated molecules (including CD157).