[1] St Johannes Hosp, Med Klin 2, Duisburg, Germany
[2] Hannover Med Sch, Inst Cell & Mol Pathol, D-3000 Hannover, Germany
[3] St Johannes Hosp, Med Clin 2, Duisburg, Germany
[4] Hannover Med Sch, Inst Cellular & Mol Pathol, D-3000 Hannover, Germany
[5] Univ Dusseldorf, Dept Hematol Oncol & Clin Immunol, Dusseldorf, Germany
[6] Klinikum Chemnitz, Clin Internal Med 3, Chemnitz, Germany
[7] Univ Hosp, Med Clin 1, Dresden, Germany
[8] Univ Hosp Dresden, Dresden, Germany