1. Department of BioMedical Research, University of Bern, 3008 Bern, Switzerland
2. Department of Immunology RIA, University Hospital Bern, 3010 Bern, Switzerland
3. Graduate School of Cellular and Biomedical Sciences, University of Bern, 3012 Bern, Switzerland
4. Artemis Bioservices, 2629 JD Delft, The Netherlands
5. Latvian Biomedical Research & Study Centre, Ratsupites iela 1, LV 1067 Riga, Latvia
6. Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
7. Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7DQ, UK