1. GEFACA Investigators-GEMA GROUP, Buenos Aires, Argentina; Hospital Durand, Buenos Aires, Argentina
2. GEFACA Investigators-GEMA GROUP, Buenos Aires, Argentina; Hospital Ramos Mejia, Buenos Aires, Argentina
3. GEFACA Investigators-GEMA GROUP, Buenos Aires, Argentina; Instituto del Corazon, Cordoba, Argentina
4. GEFACA Investigators-GEMA GROUP, Buenos Aires, Argentina; G.E.M.A. Grupo de Estudios Multicentricos Argentinos, Argentina
5. GEFACA Investigators-GEMA GROUP, Buenos Aires, Argentina; Hospital de Clinicas, Buenos Aires, Argentina