1. Program of Cardiovascular Diseases, Centre for Applied Medical Research; University of Navarra; Pamplona Spain
2. Division of Cardiology; Donostia University Hospital, University of the Basque Country San Sebastian; Spain
3. Division of Internal Medicine; Donostia University Hospital, University of the Basque Country San Sebastian; Spain
4. Department of Cardiology and Cardiac Surgery; University of Navarra Clinic, University of Navarra; Pamplona Spain