[1] Univ Regensburg, Dept Hematol Oncol, D-8400 Regensburg, Germany
[2] Univ Regensburg, Dept Internal Med 1, D-8400 Regensburg, Germany
[3] Med Univ Vienna, Dept Internal Med 1, Vienna, Austria
[4] Newcastle Univ, Sch Lab & Clin Sci, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[5] Hosp St Louis, Hematopoiet Stem Cell Transplantat Unit, Paris, France
[6] Univ Rostock, Dept Hematol & Oncol, D-2500 Rostock 1, Germany
[7] Univ Freiburg, Dept Hematol & Oncol, D-7800 Freiburg, Germany