[1] Goethe Univ Frankfurt, Frankfurt, Germany
[2] Univ Hosp, Essen, Germany
[3] Univ Hosp, Freiburg, Germany
[4] Univ Hosp Kiel, Kiel, Germany
[5] Univ Hosp Leipzig, Leipzig, Germany
[6] Univ Hosp Magdeburg, Magdeburg, Germany
[7] Krankenhaus Munchen Schwabing, Munich, Germany
[8] Klinikum Nuernberg Nord Nurnberg, Nurnberg, Germany
[9] Klin Onkol & Hamatol, Oldenburg, Germany
[10] Univ Ulm, Ulm, Germany
[11] Charite, Charite Ctr 14, Med Klin Hamatol Onkol & Transfus Med 3, D-13353 Berlin, Germany
[12] Univ Schleswig Holstein, Dept Internal Med 2, Kiel, Germany
[13] JW Goethe Univ Hosp, Dept Med 2, Frankfurt, Germany