Continous electrocardiographic monitoring in men older than 70 years without apparent heart disease - Wajngarten, M; Grupi, C; Souza, M F; Braga, A M; Coimbra, M A; Pierri, H; Barbosa, S A; Bellotti, Giovanni; Pileggi, F; Serro Azul, Luis Gastão C. C. de (Normal Aging and Clinical Problems in the Elderly, 1987)