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 Hospital General Universitario Gregorio Marañón Madrid Spain
4. Department of Cardiology Hospital Universitario La Paz Madrid Spain
5. Department of Cardiology Hospital Clínico San Carlos Madrid Spain
6. Department of Cardiology and Cardiothoracic Surgery Freeman Hospital Newcastle upon Tyne UK
7. Department of Microbiology Freeman Hospital Newcastle upon Tyne UK
8. Newcastle University, Biosciences Institute Newcastle upon Tyne UK