[1] Heidelberg Univ, Natl Ctr Tumor Dis, D-69120 Heidelberg, Germany
[2] Univ Clin Heidelberg, Dept Anesthesiol, D-69120 Heidelberg, Germany
[3] Univ Clin Heidelberg, Dept Surg, D-69120 Heidelberg, Germany
[4] Univ Clin Heidelberg, Dept Radiol, D-69120 Heidelberg, Germany
[5] Univ Clin Heidelberg, Dept Pathol, D-69120 Heidelberg, Germany
[6] Marienhosp Wesel, Dept Med 2, D-46483 Wesel, Germany