[1] Univ Cologne, Dept Internal Med 1, D-50924 Cologne, Germany
[2] Johannes Gutenberg Univ Mainz, Dept Med 3, Mainz, Germany
[3] Johannes Gutenberg Univ Mainz, Dept Radiol, Mainz, Germany
[4] Univ Hosp Gasthuisberg, Dept Hematol, Louvain, Belgium
[5] Hop Hautepierre, Dept Hematol & Oncol, Strasbourg, France