1. Telomeres and Telomerase Group Molecular Oncology Program Spanish National Cancer Centre (CNIO) Melchor Fernández Almagro 3 Madrid E‐28029 Spain
2. Center of Animal Biotechnology and Gene Therapy Department of Biochemistry and Molecular Biology School of Veterinary Medicine Universitat Autònoma de Barcelona Bellaterra 08193 Spain
3. Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM) Madrid Spain