1. These authors contributed equally to this work
2. Medical Intensive Care Unit, Bichat-Claude Bernard Hospital (Assistance Publique-Hôpitaux de Paris) and Paris-7 University, Paris, France
3. Department of Bacteriology, EA3964 and National Reference Centre for Antimicrobial Resistances in Commensal Flora, Bichat-Claude Bernard Hospital (Assistance Publique-Hôpitaux de Paris) and Paris-7 University, Paris, France
4. Department of Microbiology, National School of Public Health, Athens, Greece
5. Infection Control Unit, Bichat-Claude Bernard Hospital (Assistance Publique-Hôpitaux de Paris) and Paris-7 University, Paris, France