The enzymatic antioxidant system in blood and glutathione status in Human Immuno-deficiency Virus-1 (HIV)-infected patients: effects of supplementation with selenium or β-carotene - Delmas-Beauvieux, MC; Peuchant, E; Couchouron, A; Constans, J; Sergeant, C; Simonoff, M; Pellegrin, JL; Leng, B; Conri, C; Clerc, M (Am J Clin Nutr, 1996)