6Kelishadi R, Poursafa P. Obesity and air pollution: global risk fac- tors for pediatric non-alcoholic fatty liver disease [J].Hepat Mon, 2011,11 (10) : 794-802.
8Machado M, Marques-Vidal P, Cortez-Pinto H. Hepatic histology in obese patients undergoing bariatric surgery [ J ]. J Hepca:ol,2006, 45 (4) : 600-606.
9Gholam PM,Flancbanm L, Machan JT, et 01. Nonalcoholic fatty liver disease in severely obese subjects [J]. Am J Ga, troenterol, 2007,102 ( 2 ) : 399 -408.
10Franzese A, Vajro P, Argenziano A, et ol. Liver involvement in obese children. Ultrasonography and liver enzyme levels at diagn- osis and during follow-up in an Italian population [J]. Dig Dis Sci, 1997,42(7) : 1428-1432.