Clinical significance of the venous occlusion test in patients with systemic lupus erythematosus: a focus on changes in blood levels of tissue plasminogen activator, von Willebrand factor antigen and thrombomodulin - Matsuda, J; Kawasugi, K; Gohchi, K; Saitoh, N; Tsukamoto, M; Kazama, M; Kinoshita, T (Acta Haematol, 1992)