[1] CHU Vaudois, Infect Dis Serv, Dept Med, CH-1011 Lausanne, Switzerland
[2] Univ Lausanne, CH-1015 Lausanne, Switzerland
[3] CHU Vaudois, Transplantat Ctr, CH-1011 Lausanne, Switzerland
[4] CHU Vaudois, Inst Social & Prevent Med, Ctr Clin Epidemiol, CH-1011 Lausanne, Switzerland
[5] CHU Vaudois, Inst Microbiol, CH-1011 Lausanne, Switzerland