High prevalence of hyperhomocysteinemia in patients with inflammatory bowel disease: a pathogenetic link with thromboembolic complications? - Cattaneo, M; Vecchi, M; Zighetti, ML; Saibeni, S; Martinelli, I; Omodei, P; Mannucci, PM; de Franchis, R (Thromb Haemost, 1998)