a European Association for the Study of Obesity, London , UK; b Department of Endocrinology & Nutrition, Clínica Universidad de Navarra, University of Navarra, IdiSNA, CIBEROBN, Instituto de Salud Carlos III, Pamplona , Spain; c Società Italiana dell’Obesità", Rome , Italy; d Department of Systems Medicine, University of Rome ‘Tor Vergata’ and Obesity Center, University Hospital Policlinico Tor...