Relationships between vascular/plasma biopterins and endothelial nitric oxide synthase coupling, endothelial function and inflammation, in human atherosclerosis - Antoniades, C; Shirodaria, C; Leeson, P; Crabtree, M; Pillai, R; Ratnatunga, C; Tousoulis, D; Antonopoulos, A; Stetanadis, C; Channon, K (JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY, 2008)