De novo splice site mutation in the antithrombin III (AT3) gene causing recurrent venous thrombosis: demonstration of exon skipping by ectopic transcript analysis - Berg, L P; Grundy, C B; Thomas, F; Millar, D S; Green, P J; Slomski, R; Reiss, J; Kakkar, V V; Cooper, D N (Genomics, 1992)