Department of Gastroenterology and Hepatology, Amsterdam University Medical Center, Amsterdam, The Netherlands. Department of Endocrinology and Metabolism, Amsterdam University Medical Center, Amsterdam, The Netherlands. Department of Internal Medicine, Amsterdam University Medical Center, Amsterdam, The Netherlands. Department of Cardiovascular Medicine, Amsterdam University Medical Center, Amsterdam, The Netherlands. Department of Surgery, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands. Department of General, Visceral and Transplantation Surgery, RWTH University Hospital Aachen, Aachen, Germany. Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry and Pediatrics, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands. Department of Core Facility Metabolomics, Amsterdam UMC, Amsterdam, The Netherlands.