Volume 29 Issue 9, September 2019

The cover uses a Chinese historical allusion of “beans casted on the ground magically turn into soldiers” to depict the intra-tumoral heterogeneity in pancreatic ductal adenocarcinoma and the battle between tumor cells (soldiers with shields) and T cells (soldiers with swords). See page 725-738 by Junya Peng et al. for details.