[1] IRC, Lab Thrombosis Res, B-8500 Kortrijk, Belgium
[2] Univ Free State, Dept Haematol & Cell Biol, Bloemfontein, South Africa
[3] Univ Free State, Dept Paediat & Child Hlth, Bloemfontein, South Africa
[4] Katholieke Univ Leuven, Dept Cardiol, Louvain, Belgium