[1] Univ Madrid, Hosp Gen Gregorio Maranon, Dept Anaesthesia, E-28007 Madrid, Spain
[2] Univ Madrid, Hosp Gen Gregorio Maranon, Clin Microbiol & Infect Dis Dept, E-28007 Madrid, Spain
[3] Univ Hosp AKH, Cardiothorac & Vasc Anaesthesia & Intens Care Dep, Vienna, Austria