Center for Clinical Heart Research, Department of Cardiology, Oslo University Hospital Ullevål, 0450, Oslo, Norway; Department of Endocrinology and Nutrition, August Pi i Sunyer Biomedical Research Institute - IDIBAPS, Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Madrid, Spain; Faculty of Medicine, University of Oslo, 0372, Oslo, Norway. Electronic address: gchiva@clinic.cat. Center for Clinical Heart Research, Department of Cardiology, Oslo University Hospital Ullevål, 0450, Oslo, Norway; Faculty of Medicine, University of Oslo, 0372, Oslo, Norway. Department of Cardiology, Aalborg University Hospital, Denmark. Cardiovascular Program ICCC, Institut de Recerca Hospital Santa Creu i Sant Pau-IIB Sant Pau, Barcelona, Spain; Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), Instituto de Salud Carlos III (ISCIII), Madrid, Spain.