1.【题名】:Expression of PD-1, PD-L1, and PD-L2 in the liver in autoimmune liver diseases. 【作者】:Mataki N, Kikuchi K, Kawai T, Higashiyama M, Okada Y, Kurihara C, Hokari R, Kawaguchi A, Nagao S, Kondo T, Itoh K, Miyakawa H, Miura S. 【杂志名全称】: Am J Gastroenterol. 【年, 卷(期), 起止页码】: 2007 Feb;102(2):302-12. 【全文链接】:http://www.nature.com/ajg/journal/v102/n2/full/ajg200751a.html