%0 Journal Article %T Pit cells exclusively kill P815 tumor cells by the perforin/granzyme pathway %A Vermijlen David %A Luo Dianzhong %A Froelich Christopher J %A Medema Jan P %J Comparative Hepatology %D 2004 %I BioMed Central %R 10.1186/1476-5926-2-s1-s58 %U http://www.comparative-hepatology.com/content/3/S1/S58