Hofstad, J. K.; Winther, S. B.; Rian, T.; Foss, O. A.; Husby, O. S.; Wik, T. S. Perioperative Local Infiltration Anesthesia With Ropivacaine Has No Effect on Postoperative Pain After Total Hip Arthroplasty. ActaO 2015, 86, 654-658.