2[2]Franzese A, Vajro P, Argenziano A, et al. Liver involvement in obese children: ultrasonography and liver enzyme levels at diagnosis and during follow-up in an Italian population. Dig Dis Sci, 1997,42:1428~1432
8Ludwig J, Viggiano TR, MeGitl DB, et al. Nonalcoholic steatohepatitis : Mayo Clinic experiences with a hitherto unnamed disease [J]. Mayo Clin Proc,1980,55(7) :434 -438.