Ambulatory blood pressure. An independent predictor of prognosis in essential hypertension - Verdecchia, P; Porcellati, C; Schillaci, G; Borgioni, C; Ciucci, A; Battistelli, M; Guerrieri, M; Matteschi, C; Zampi, I; Gattucci, C; Reboldi, G (Hypertension, 1994)