Plasma concentration of asymmetrical dimethylarginine and mortality in patients with end-stage renal disease: a prospective study - Zoccali, C; Bode-Böger, S; Mallamaci, F; Benedetto, F; Tripepi, G; Malatino, L; Cataliotti, A; Bellanuova, I; Fermo, I; Frolich, J; Böger, R (Lancet, 2001)