1 Department of Cancer Biology, Abramson Family Cancer Research Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
2 Division of Gastroenterology and Hepatology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
3 Department of Radiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
4 Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
5 Department of Pathology and Laboratory Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
6 I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
7 Department of Cancer Biology, Abramson Family Cancer Research Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA. huax@pennmedicine.upenn.edu.