1. Division of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
2. Department of Pediatrics, University of Washington School of Medicine, and Seattle Children's Research Institute, Seattle, WA, USA
3. Department of Immunology, Department of Translational Immunology, and Department of Pathology, Genentech, Inc., South San Francisco, CA, USA
4. Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland