1. The Section of Cardiology; The Department of Medicine; Baylor College of Medicine; Houston TX USA
2. Heart Hospital; Tampere University Hospital and University of Tampere; Finland
3. The New York-Presbyterian Hospital-Weill Cornell Medical Center; New York NY
4. Coronary Care Unit; Palma's Institute of Health Research (IdISPa); Hospital Son Espases; Palma de Mallorca Spain
5. Cardiology Service; Vall d'Hebron University Hospital; VHIR; Autonomous University of Barcelona; Barcelona Spain
6. Intensive Cardiac Care Unit; Cardiology Department; Biomedical Research Institute Sant Pau (IIB Sant Pau); Barcelona Spain
7. Department of Clinical Sciences; Lund University and Skåne University Hospital; Lund Sweden
8. Regional Health Services of El Hierro; Valle del Golfo Health Center; Canary Islands Spain
9. The Catalan Institute for Cardiovascular Sciences; Barcelona Spain