1. Institute of Virology, Vetsuisse Faculty University of Zurich, Zurich, Switzerland
2. Department of Health, Cantonal Laboratory Ticino, Division of Public Health, Bellinzona, Switzerland
3. Department of Laboratory Medicine, Laboratory of Bacteriology, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
4. Neurology Department, Neurocenter of Southern Switzerland, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
5. Internal Medicine and Infectious Diseases Department, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
6. Department of Farm Animals, Division of Swine Medicine, Vetsuisse Faculty University of Zurich, Zurich, Switzerland
7. Institute for Food Safety and Hygiene, Vetsuisse Faculty University of Zurich, Zurich, Switzerland