[1] German Canc Res Ctr, DKTK Clin Cooperat Unit Neuroimmunol & Brain Tumo, Heidelberg, Germany
[2] Univ Heidelberg Hosp, Neurol Clin, Heidelberg, Germany
[3] Natl Ctr Tumor Dis, Heidelberg, Germany
[4] German Canc Res Ctr, Dept Mol Oncol Gastrointestinal Tumors, Heidelberg, Germany
[5] Univ Heidelberg Hosp, Surg Clin, European Pancreas Ctr, Heidelberg, Germany