[1] Johannes Gutenberg Univ Mainz, Dept Internal Med, D-55101 Mainz, Germany
[2] Johannes Gutenberg Univ Mainz, Inst Med Biostat Epidemiol & Informat, D-55101 Mainz, Germany
[3] Johannes Gutenberg Univ Mainz, Dept Radiol, D-55101 Mainz, Germany
[4] Johannes Gutenberg Univ Mainz, Dept Transplantat & Hepatobiliopancreat Surg, D-55101 Mainz, Germany
[5] Leopoldina Hosp Schweinfurt, Dept Internal Med 2, Schweinfurt, Germany