MSTN and animal viral hepatitis: Although we could not analyze serum myostatin levels in cirrhotic patients with chronic hepatitis B or C because of no available serum, we guess that serum myostatin levels in patients with alcoholic cirrhosis may be similar to those with chronic viral hepatitis: Median levels of serum myostatin were 3.3 ng/mL in our population with alcoholic cirrhosis and 3.1 ng/mL in patients who mainly had etiologies of chronic viral hepatitis B or C in a previous study [9].