1. Department of Gastroenterology and Hepatology; Erasmus MC University Medical Center; Rotterdam The Netherlands
2. Department of Pediatrics; Erasmus MC University Medical Center; Rotterdam The Netherlands
3. Department of Epidemiology; Erasmus MC University Medical Center; Rotterdam The Netherlands
4. Department of Medicine; New York University School of Medicine; New York USA
5. Department of Internal Medicine; Erasmus MC University Medical Center; Rotterdam The Netherlands