1 Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK York Teaching Hospital NHS Foundation Trust, York, UK.
2 Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain Instituto de investigación i+12 and Cardiology Department, Hospital Universitario 12 de Octubre, Madrid, Spain Universidad Complutense de Madrid, Madrid, Spain hbueno@cnic.es.