Increase in oxidative stress but not in antioxidant capacity with advancing stages of chronic kidney disease - Karamouzis, I; Sarafidis, P A; Karamouzis, M; Iliadis, S; Haidich, A B; Sioulis, A; Triantos, A; Vavatsi-Christaki, N; Grekas, D M (Am J Nephrol, 2008)