1. Institut d’Investigació Biomèdica Sant Pau (IIB Sant Pau), 08041 Barcelona, Spain
2. Department of Biochemistry and Molecular Biology B and Immunology, Faculty of Medicine, University of Murcia (UMU), 30120 Murcia, Spain
3. CIBER of Diabetes and Related Metabolic Diseases, Instituto de Salud Carlos III, 28029 Madrid, Spain