Interacting alleles of the coinhibitory immunoreceptor genes cytotoxic T-lymphocyte antigen 4 and programmed cell-death 1 influence risk and features of primary biliary cirrhosis - Juran,B.D.; Atkinson,E.J.; Schlicht,E.M.; Fridley,B.L.; Petersen,G.M.; Lazaridis,K.N. (Hepatology, 2008)