[1] Univ Hosp Essen, Dept Nephrol, Essen, Germany
[2] Univ Hosp Essen, West German Ctr Infect Dis, Dept Infect Dis, Dept Nephrol, Essen, Germany
[3] Univ Hosp Essen, Inst Transfus Med, Essen, Germany
[4] Univ Hosp Essen, Dept Infect Dis, West German Ctr Infect Dis, Essen, Germany
[5] Univ Hosp Aachen, Dept Med Microbiol, German Natl Reference Ctr Streptococci, Aachen, Germany
[6] Univ Hosp, Inst Transfus Med, Essen, Germany