Heart valve replacement with St. Jude Medical valve prosthesis. Long-term experience in 743 patients in Switzerland - Burckhardt, D; Striebel, D; Vogt, S; Hoffmann, A; Roth, J; Weiss, P h; Kiowski, W; Pfisterer, M; Burkart, F; Althaus, U; Goy, J J; Sadeghi, H; Gradel, E (Circulation, 1998)