Drupal-Bibcite0<style face="normal" font="default" size="100%">Outcomes after osteoarthritis hip or knee replacement surgery. A prospective cohort study comparing patients' quality of life before and after surgery with age-related population norms</style><style face="normal" font="default" size="100%">Outcomes after osteoarthritis hip or knee replacement surgery. A prospective cohort study comparing patients' quality of life before and after surgery with age-related population norms</style>