1. Department of Medicine Marienhausklinik St. Josef Kohlhof Neunkirchen Germany
2. Department of Medicine II Saarland University Medical Center, Saarland University Homburg Germany
3. Institute of Pathology Saarbrücken‐Rastpfuhl Saarbrücken Germany
4. Department of General‐ and Visceral Surgery Marienhausklinik St. Josef Kohlhof Neunkirchen Germany