The Spanish society of hypertension ABPM registry. Main results from the 50,000-patient database - Gorostidi, M; Sobrino, J; Segura, J; de la Cruz, J J; Llisterri, J L; Alonso, J; Sierra, C; Hernandez del Rey, R; Vinyoles, E; Aranda, P; Banegas, J R; Ruilope, L M (Journal Of Hypertension, 2008)