[1] Univ Hosp Basel, Ctr Musculoskeletal Infect, Spital str 21, CH-4031 Basel, Switzerland
[2] Univ Hosp Basel, Dept Orthopaed & Trauma Surg, Basel, Switzerland
[3] Univ Hosp Basel, Dept Infect Dis & Hosp Epidemiol, Basel, Switzerland
[4] Univ Bern, Inst Infect Dis, Bern, Switzerland