Long-term ascorbic acid administration reverses endothelial vasomotor dysfunction in patients with coronary artery disease - Gokce, N; Keaney, J F, Jr.; Frei, B; Holbrook, M; Olesiak, M; Zachariah, B J; Leeuwenburgh, C; Heinecke, J W; Vita, J A (Circulation, 1999)