Simonsson, Johan, et al. “Worse Patient-Reported Outcomes and Higher Risk of Reoperation and Adverse Events After Total Hip Replacement in Patients With Opioid Use in the Year before Surgery: A Swedish Register-Based Study on 80,483 Patients”. Acta Orthopaedica, vol. 93, Jan. 2022, pp. 190-7, doi:10.2340/17453674.2021.1021.