1. Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland.
2. Krefting Research Centre, Department of Internal Medicine and Clinical Nutrition, University of Gothenburg, Gothenburg, Sweden.
3. Department of Medicine, Peter Medawar Building for Pathogen Research, University of Oxford, Oxford, UK.
4. Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland.