Systemic oxidative stress and its relationship with age and illness. - Mezzetti,A.; Lapenna,D.; Romano,F.; Costantini,F.; Pierdomenico,S.D.; De Cesare,D.; Cuccurullo,F.; Riario-Sforza,G.; Zuliani,G.; Fellin,R, . (J Am Geriat Soc, 1996)