Zethraeus, Niklas, Lars Strömberg, Bengt Jönsson, Olle Svensson, and Gunnar Öhlén. 1997. “The Cost of a Hip Fracture: Estimates for 1,709 Patients in Sweden”. Acta Orthopaedica 68 (1):13-17. https://doi.org/10.3109/17453679709003968.