1. Cardiology Department, Hospital Universitario Fundación Alcorcón, Madrid, Spain (C.J.M., R.D.C.-M., P.R.V., E.B.L., J.B.R.)
2. Internal Medicine Department (A.V.S.), Hospital Universitario Fundación Alcorcón, Madrid, Spain.
3. Cardiology Department (M.A.G.), Hospital Clínico San Carlos, Madrid, Spain.
4. Cardiac Surgery Department (P.C.F.), Hospital Clínico San Carlos, Madrid, Spain.
5. Pathology Department (M.S.-P.S., L.O.M.), Hospital Clínico San Carlos, Madrid, Spain.