Neurosciences Research Program. Integrative Pharmacology and Systems Neuroscience Group, IMIM-Hospital del Mar Medical Research Institute, Barcelona, Spain. CIBER de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Santiago de Compostela, Spain. Starlab Barcelona SL, Barcelona, Spain. Morbid Obesity Care Unit, IMIM-Hospital del Mar Medical Research Institute Barcelona, Barcelona, Spain. Unit of Cardiovascular Risk and Nutrition, IMIM-Hospital del Mar Medical Research Institute Barcelona, Barcelona, Spain. Neuroelectrics Corporation, Cambridge, Massachusetts, USA. Laboratory of Bariatric and Nutritional Neuroscience, Center for the Study of Nutrition Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Harvard University, Boston, Massachusetts, USA.