Maempel, J.F., Riddoch, F., Calleja, N. and Brenkel, I.J. 2015. Longer hospital stay, more complications, and increased mortality but substantially improved function after knee replacement in older patients. Acta Orthopaedica. 86, 4 (Jul. 2015), 451–456. DOI:https://doi.org/10.3109/17453674.2015.1040304.