Jørgensen, C.C., Gromov, K., Petersen, P.B., Kehlet, H. and Lundbeck Foundation Centre for Fast-track Hip and Knee Replacement Collaborative Group 2020. Influence of day of surgery and prediction of LOS > 2 days after fasttrack hip and knee replacement. Acta Orthopaedica. 92, 2 (Nov. 2020), 170–175. DOI:https://doi.org/10.1080/17453674.2020.1844946.