Altered plasma vs. vascular biopterins in human atherosclerosis reveal relationships between endothelial nitric oxide synthase coupling, endothelial function and inflammation - Antomades, C; Shirodaria, C; Leeson, P; Crabtree, M; Pillai, R; Ratnatunga, C; Tousoulis, D; Stefanadis, C; Channon, K (2007)