Efficacy and safety of prolonged thromboprophylaxis with a low molecular weight heparin (dalteparin) after total hip arthroplasty - the Danis Prolonged Prophylaxis (DaPP) Study - Lassen, MR; Borris, LC; Anderson, BS; Jensen, HP; Skejo Bro, HP; Andersen, G; Petersen, AO; Siem, P; Horlyck, E; Jensen, BV; Thomsen, PB; Hansen, BR; Erin-Madsen, J; Moller, JC; Rotwitt, L; Christensen, F; Nielsen, JB; Jorgensen, PS; Paaske, B; Torholm, C; Hvidt, P; Jensen, NK; Nielsen, AB; Appelquist, E; Tjalve, E (Thromb Res, 1998)