[1] Clin Bremen E, Clin Internal Med, Bremen, Germany
[2] Univ Halle Wittenberg, Halle Saale, Germany
[3] Hannover Med Sch, D-3000 Hannover, Germany
[4] Charite, Berlin, Germany
[5] Private Oncol Clin, Hildesheim, Germany
[6] Univ Ulm, Med Clin, Ulm, Germany
[7] Hosp Maria Hilf, Monchengladbach, Germany
[8] Mayo Clin, Rochester, MN USA
[9] Res Inst WISP Langenfeld, Res Inst WISP, Langenfeld, Germany
[10] Clin Bremen E 10, Bremen, Germany