1. Research Division, Joslin Diabetes Center and Harvard Medical School, Boston, Massachusetts 02115
2. Department of Endocrinology and Metabolism, Hebei General Hospital, Shijiazhuang, Hebei, 050051, China
3. Center for Genome Sciences and Systems Biology, and Center for Gut Microbiome and Nutrition Research, Washington University School of Medicine, St. Louis, Missouri 63110
4. Metabolon, Durham, North Carolina 27713
5. Laboratory of Genetic Metabolic Diseases, Departments of Pediatrics and Clinical Chemistry, University of Amsterdam, 1105 AZ Amsterdam-Zuidoost, The Netherlands
6. Division of Gastroenterology and Hepatology, Joan & Sanford I. Weill Department of Medicine, Weill Cornell Medical College, New York, New York 10021