[1] Hannover Med Sch, Dept Gastroenterol Hepatol & Endocrinol, Hannover, Germany
[2] Inst Klin Krebsforsch IKF GmbH Krankenhaus Nordwe, Frankfurt, Germany
[3] Hannover Med Sch, Klin Gastroenterol Hepatol & Endokrinol, Hannover, Germany
[4] Ruhr Univ Bochum, St Josef Hosp, Dept Hematol Oncol & Palliat Care, Bochum, Germany
[5] Ludwig Maximilians Univ Munchen, Comprehens Canc Ctr Munich, Munich, Germany
[6] Ludwig Maximilians Univ Munchen, Dept Med 3, Univ Hosp, Munich, Germany
[7] Univ Hosp Frankfurt, Dr Senckenberg Inst Pathol, Frankfurt, Germany
[8] Hamatol Onkol Praxis Eppendorf HOPE, Hamburg, Germany
[9] Univ Canc Ctr Hamburg UCCH, Hamburg, Germany
[10] Inst Klin Krebsforsch IKF Krankenhaus Nordwest, Frankfurt, Germany