1. GRIAL Research Group Universidad de Salamanca,Salamanca,Spain
2. University Hospital of Salamanca, CIBERCV and Biomedical Research Institute of Salamanca (IBSAL),Salamanca,Spain
3. Philips Clinical Science,Western,Europe
4. Biomedical Research Institute of Salamanca (IBSAL) and University of Salamanca,Statistics Department,Salamanca,Spain
5. University Hospital of Salamanca, CIBERCV, Biomedical Research Institute of Salamanca (IBSAL) and University of Salamanca,Cardiology Department,Salamanca,Spain