1Heart Failure and Inherited Cardiac Diseases Unit, Department of Cardiology, Hospital Universitario Puerta de Hierro Majadahonda, Manuel de Falla, 2, Majadahonda, Madrid 28222, Spain
2Department of Nuclear Medicine, Hospital Universitario Puerta de Hierro, Madrid, Spain
3Department of Biochemistry, Biomedical Research Institute ‘Alberto Sols’, Medicine UAM-CSIC, Madrid, Spain
4Department of Biochemistry, Hospital Universitario Puerta de Hierro, Madrid, Spain
5Rare Diseases Biomedical Research Centre (CIBERER), Madrid, Spain
6Department of Pathology, Hospital Universitario Puerta de Hierro, Madrid, Spain
7Myocardial Biology Programme, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain