We thank Pr David A. Tuveson, (Cambridge Research Institute, Univ of Cambridge, Cambridge, UK) and R. Tomasini, PhD (Cancer Research Center of Marseille, Parc scientifique de Luminy, Marseille, France) for the gift of respectively PDX-Cre/KrasG12D/Ink4a/Arflox/lox and Pdx-1-Cre ; LSL-KrasGD12; LSL-Trp53R172H mouse pancreatic tumor slices. Here, PDX1 is linked to pancreatic neoplasm.