Cell Metab 2014 Feb;19(2):259-71
Gastroenterology Division, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Cell and Developmental Biology, Perelman School of Medicine at the University of Pennsylvania, University of Pennsylvania, Philadelphia, PA 19104, USA; Abramson Family Cancer Research Institute, Perelman School of Medicine at the University of Pennsylvania, University of Pennsylvania, Philadelphia, PA 19104, USA. Electronic address: