Antithrombins Southport (99 Leu to Val) and Vienna (118 Gin to Pro): two novel antithrombin variants with abnormal heparin binding - Chowdhury, V; Mille, B; Olds, R J; Lane, D A; Watton, J; Barrowcliffe, T W; Pabinger, I; Woodcock, B E; Thein, S L (Brit J Haematol, 1995)