1. From the Department of Cardiology, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid (A.G.-L.); Departmento de Medicina, University of Alcalá, Alcalá de Henares, Madrid (A.G.-L.; J.B.); and the Department of Cardiology, Hospital Universitario de Guadalajara, Guadalajara (J.B.), Spain.