[1] Univ Hamburg, Krankenhaus Eppendorf, Med Klin & Poliklin, Dept Med, D-20246 Hamburg, Germany
[2] Univ Hamburg, Krankenhaus Eppendorf, Dept Surg, D-20246 Hamburg, Germany
[3] Univ Hamburg, Heinrich Pette Inst Expt Virol & Immunol, D-2000 Hamburg, Germany
[4] Inst Virol, Moscow, Russia
[5] Clin Malattie Infett, Bari, Italy