1. Cajal Institute, Consejo Superior de Investigaciones Científicas, Madrid, Spain
2. Division of Diabetes and Endocrinology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
3. CIBERNED, Madrid, Spain
4. Achucarro Basque Center for Neuroscience, Leioa, Spain
5. Ikerbasque Basque Foundation for Science, Bilbao, Spain