Since last 5 years my liver enzymes levels such as SGOT and SGPT are elevated in the range of 37-43 and 82-100. Although many USGs were performed, test for HBsAg and HCV was also done along with fibroscan, test for Wilson disease (ceruloplasmin), autoimmune but all the test either came out to be normal and negative. What may be the reason behind it for such a long time?