[1] Inst Salud Carlos III, Ctr Nacl Invest Cardiovasc, Madrid, Spain
[2] Grp HM Hosp, Hosp Univ Monteprincipe, CIEC, Madrid, Spain
[3] Univ CEU San Pablo, Fac Med, Madrid, Spain
[4] Inst Nacl Cardiol Ignacio Chavez, Dept Cardiol, Mexico City, DF, Mexico
[5] Hosp Angeles Lindavista, Inst Mexicano Seguro Social, Mexico City, DF, Mexico
[6] Inst Seguridad & Serv Sociales Trabajadores Estad, Ctr Med Nacl Noviembre 20, Serv Cardiol, Mexico City, DF, Mexico
[7] Inst Mexicano Seguro Social, Div Coordinat, Unidades Med Alta Especialidad, Mexico City, DF, Mexico
[8] Ferrer Int, Dept Med, Barcelona, Spain
[9] Fdn Jimenez Diaz, Inst Invest Sanitaria, Dept Cardiol, Madrid, Spain
[10] Inst Salud Carlos III, Ctr Invest Biomed Red Enfermedades Cardiovasc, Madrid, Spain
[11] Mt Sinai Med Ctr, Cardiovasc Inst, New York, NY 10029 USA