1. Department of Gastroenterology and Hepatology, Academic Medical Center, Amsterdam, The Netherlands
2. Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Center, Amsterdam, The Netherlands
3. Department of Clinical Chemistry, Academic Medical Center, Amsterdam, The Netherlands
4. Department of Gastroenterology and Hepatology, Flevoziekenhuis Almere, The Netherlands
5. Department of Gastroenterology and Hepatology, Erasmus Medical Center, Rotterdam, The Netherlands