1. Department of Cardiology Hospital Clínico Universitario de Santiago de Compostela Santiago de Compostela Spain
2. University of Santiago de Compostela Santiago de Compostela Spain
3. Department of Cardiology Freeman Hospital Newcastle upon Tyne UK
4. Department of Cardiothoracic Surgery Freeman Hospital Newcastle upon Tyne UK
5. Newcastle University Biosciences and Translational and Clinical Research Institutes Newcastle upon Tyne UK