Division of Gastroenterology and Hepatology, Department of Internal Medicine, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, The Netherlands. Electronic address: z.weerts@maastrichtuniversity.nl. Division of Gastroenterology and Hepatology, Department of Internal Medicine, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, The Netherlands. Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands; Department of Gastroenterology and Hepatology, Gelderse Vallei Hospital, Ede, The Netherlands. Department of Gastroenterology, Alrijne Zorggroep, Leiden, The Netherlands. Department of Methodology and Statistics, CAPHRI, Care and Public Health Research Institute, Maastricht University Medical Center, Maastricht, The Netherlands. Unit of Pharmacotherapy, Epidemiology, and Economics, University of Groningen, Groningen Research Institute of Pharmacy, The Netherlands. Department of Pharmaceutical Technology and Biopharmacy, University of Groningen, Groningen Research Institute of Pharmacy, The Netherlands. Department of Family Medicine, CAPHRI Care and Public Health Research Institute, Maastricht University Medical Center, Maastricht, The Netherlands. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands. Department of Clinical Epidemiology and Medical Technology Assessment, Maastricht University Medical Center, Maastricht, The Netherlands. Department of Clinical and Experimental Medicine, Translational Research Center for Gastrointestinal Diseases (TARGID), University of Leuven, Leuven, Belgium. Department of Gastroenterology and Hepatology, Medical Center Leeuwarden, Leeuwarden, The Netherlands.