2[1]Luscher TF, Boulanger CM, Yang Z, et al. Interactions between endothelium derived relaxing and contracting factor in health and cardiovascular disease[J]. Circulation, 1993, 87(Suppl): 36
3[2]Panza JA, Casino PR, Badar DM, et al. Effect of increased availability of endotheliumderived nitric oxide precusor on endtheliumdependened vascular relaxation in normal aubjects and in patients with essential hypertension[J]. Circulation,1993, 87:1468
4[3]Lassen LH, Ashina M, Christianen I, et al. Nitric oxide synthase inhibition: a new principle in the treatment of migraime attacks [J]. Cephalagia, 1998, 18(1): 27