However, the endothelial damage observed in ME/CFS patients does not appear to correlate with the usual markers of endothelial dysfunction seen in cardiovascular disease such as increased levels of symmetric dimethylarginine (SDMA), asymmetric dimethylarginine (ADMA), and high-sensitivity C-reactive protein (hs-CRP), and reduced levels of arginine and homoarginine (311). Here, CRP is linked to myalgic encephalomeyelitis/chronic fatigue syndrome.