1. Department of Intensive Care Medicine Centre Hospitalier du Valais Romand de l'Hôpital du Valais (site de Sion) Sion Switzerland
2. Department of Vascular Surgery Centre Hospitalier du Valais Romand de l'Hôpital du Valais (site de Sion) Sion Switzerland
3. Department of Vascular Surgery Centre Hospitalier Universitaire Vaudois and University of Lausanne Lausanne Switzerland
4. Division of Angiology and Haemostasis Faculty of Medicine Geneva University Hospitals Geneva Switzerland
5. Department of Infectious Diseases Institut Central des Hôpitaux Hôpital du Valais Sion Switzerland
6. Department of Infectious Diseases Institute of Microbiology Centre Hospitalier Universitaire Vaudois Lausanne Switzerland