%0 Journal Article %T PD-1 expression and its significance in tumour microenvironment of hepatocellular carcinoma %A Ann-Marie Chacko %A Kai Wei Tan %A Valerie Chew %J Archive of "Translational Gastroenterology and Hepatology". %D 2019 %R 10.21037/tgh.2019.06.08 %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6691086/