[1] Saarland Univ, Dept Hematol Oncol Rheumatol & Clin Immunol, Med Ctr, Homburg, Germany
[2] Univ Leipzig, Inst Med Informat Stat & Epidemiol, Leipzig, Germany
[3] Westpfalz Klinikum, Dept Internal Med 1, Kaiserslauern, Germany
[4] Univ Hosp Regensburg, Nucl Med, Regensburg, Germany
[5] Univ Regensburg, Dept Nuclearmed, Regensburg, Germany
[6] Univ Hosp Saarland, German Nonhodgkins Lymphoma Study Grp, Homburg, Germany
[7] Univ Ulm, Dept Internal Med 3, Ulm, Germany
[8] Univ Hosp Essen, Dept Nucl Med, Essen, Germany
[9] Univ Hosp Essen, Dept Hematol, Essen, Germany
[10] Univ Hosp Regensburg, Dept Nucl Med, Regensburg, Germany
[11] Univ Hosp Saarland, Dept Hematol, Homburg, Germany