Anna Mae Diehl1, Nathalie J Farpour-Lambert2, Liping Zhao3,4, Herbert Tilg5. 1. Department of Medicine, Duke University, Durham, NC, USA. annamae.diehl@duke.edu. 2. Obesity Prevention and Care Program "Contrepoids", Service of Therapeutic Education for Chronic Diseases, Department of Primary Care, University Hospitals of Geneva, Geneva, Switzerland. 3. Department of Biochemistry and Microbiology, Institute of Food, Nutrition and Health, Rutgers University, Newark, NJ, USA. 4. State Key Laboratory for Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China. 5. Department of Internal Medicine I, Gastroenterology, Hepatology, Metabolism & Endocrinology, Innsbruck, Austria. herbert.tilg@i-med.ac.at.