1 Division of Gastroenterology and Hepatology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado. Electronic address: taylor.karl@cuanschutz.edu.
2 Department of Pathology, University of Colorado Anschutz Medical Campus, Aurora, Colorado.
3 Division of Gastroenterology and Hepatology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado.