[1] Univ Hosp Munich, Dept Internal Med 3, Munich, Germany
[2] Klinikum Oldenburg, Oldenburg, Germany
[3] Univ Saarland, D-6650 Homburg, Germany
[4] Univ Gottingen, Gottingen, Germany
[5] Univ Cologne, Dept Med 1, Cologne, Germany
[6] Municipal Med Ctr, Braunschweig, Germany
[7] Univ Hosp, Essen, Germany
[8] St Louis Hosp, Dept Hematol, Paris, France
[9] Univ Groningen, Univ Med Ctr Groningen, NL-9713 AV Groningen, Netherlands
[10] Acad Hosp St Jan, Brugge, Belgium