Hofstad, J.K. et al. 2015. Perioperative local infiltration anesthesia with ropivacaine has no effect on postoperative pain after total hip arthroplasty. Acta Orthopaedica. 86, 6 (Nov. 2015), 654–658. DOI:https://doi.org/10.3109/17453674.2015.1053775.