Regular exercise, plasminogen activator inhibitor-1 (PAI-1) activity and the 4G/5G promoter polymorphism in the PAI-1 gene - Väisänen, S B; Humphries, S E; Luong, L A; Penttilä, I; Bouchard, C; Rauramaa, R (Thromb Haemost, 1999)