Affiliation: | 1. Division of Gastrointestinal and Liver Diseases, Department of Medicine, USC Research Center for Liver Diseases, University of Southern California, Keck School of Medicine, Los Angeles, California;2. Department of Molecular Microbiology and Immunology, University of Southern California, Keck School of Medicine, Los Angeles, California;3. Department of Pathology, University of Southern California, Keck School of Medicine, Los Angeles, California |