Vascular Complications of Severe Hyperhomocysteinemia in Patients with Homocystinuria Due to Cystathionine β-Synthase Deficiency: Effects of Homocysteine-Lowering Therapy - YAP, SUFIN; NAUGHTEN, EILEEN R; WILCKEN, BRIDGET; WILCKEN, DAVID E.L.; BOERS, GODFRIED H.J. (Seminars in Thrombosis and Hemostasis, 2000)