Fredin, H. O., Nillius, S. A., & Bergqvist, D. (1982). Prophylaxis of Deep Vein Thrombosis in Patients with Fracture of the Femoral Neck: A Prospective Comparison between Dextran and a Sulphated Polysaccharide. Acta Orthopaedica, 53(3), 413–417. https://doi.org/10.3109/17453678208992235