[1] Univ Klin Erlangen, Endocrinol Dept, Gastroenterol & Hepatol, Erlangen, Germany
[2] Klinikum St Marien Amberg, Onkolog Zentrum, Amberg, Germany
[3] Tech Univ Munich, Inst Pathol, Munich, Germany
[4] AIO Studien gGmbH, Project Management Dept, Berlin, Germany
[5] Natl Ctr Tumor Dis NCT, Dept Med Oncol, Heidelberg, Germany