6Amarapurkar DN, Hashimoto E, Lesmana LA, et al. Howcommon is non - alcoholicfatty liver disease in the Asia - Pacificregion and are there local diferences Ⅲ[ J]. Gastroenterol Hepatol,2007 ,22 :788 - 793.
7R F Cooke, N Silva de1 Rpo, D Z Caraviello, et al. Supplemental cho- line for prevention and alleviation of fatty liver in dairy cattle [ J ]. J Dairy Sci ,2007,90:2413 - 2418.