[1] Zollernalb Clin, Dept Internal Med, Balingen, Germany
[2] Otto von Guericke Univ Hosp, Clin Gastroenterol Hepatol & Infect Dis, Magdeburg, Germany
[3] Saarland Univ Hosp, Dept Diagnost & Intervent Radiol, Homburg, Germany
[4] Univ Kiel, Inst Pathol, Kiel, Germany
[5] Univ Bern, Dept Clin Pharmacol, Bern, Switzerland
[6] Saarland Univ Hosp, Dept Clin Chem, Homburg, Germany
[7] Novartis Asia Pacific Pharmaceut, Singapore, Singapore