Associations between gamma-glutamyl transferase, metabolic abnormalities and inflammation in healthy subjects from a population-based cohort: a possible implication for oxidative stress - Bo, S; Gambino, R; Durazzo, M; Guidi, S; Tiozzo, E; Ghione, F; Gentile, L; Cassader, M; Pagano, G F (World J Gastroenterol, 2005)