GPT and viral hepatitis: Fatty liver disease indicated by ALT (7) or a combination of ALT and ultrasound (67), or liver biopsy,ANDTest for exclusion of other main causes of liver steatosis (e.g., serum lactate, iron, ferritin, pyruvate, copper, ceruloplasmin, alpha 1-antitrypsin level, viral hepatitis panel, liver autoantibodies).