1. Cardiology Department, University Hospital Álvaro Cunqueiro, 36213 Vigo, Spain
2. Health Research Institute Galicia Sur, 36312 Vigo, Spain
3. Faculty of Medicine, University Complutense of Madrid, 28040 Madrid, Spain
4. Anaesthesiology Department, University Hospital Álvaro Cunqueiro, 36312 Vigo, Spain
5. Nephrology Department, Regional University Hospital of Málaga, 29010 Málaga, Spain
6. Cardiovascular Surgery, University Hospital Álvaro Cunqueiro, 36312 Vigo, Spain