1. Inserm, CIC 1408, I-REIVAC, University Hospital of Saint-Etienne, Saint-Etienne, France
2. GIMAP EA 3064, University of Lyon, Saint-Etienne, France
3. Inserm CIC 1417, I-REIVAC, University of Paris-Descartes, University Hospital of Cochin-Broca-Hôtel-Dieu, Paris, France
4. Infection control unit, University Hospital of Saint-Etienne, Saint-Etienne, France