1. Telomeres and Telomerase Group, Molecular Oncology Program and
2. Human Genetics Group, Spanish National Cancer Research Centre, Madrid, Spain;
3. Roche Pharma Research and Early Development, Neuroscience, Ophthalmology, and Rare Disease, Roche Innovation Center and
4. Roche Extending the Innovation Network Academia Partnering Program, F. Hoffmann-La Roche, Basel, Switzerland; and
5. Centre of Animal Biotechnology and Gene Therapy, Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, Bellaterra, Spain