High-volume local infiltration analgesia combined with intravenous or local ketorolac+morphine compared with epidural analgesia after total knee arthroplasty

The study has been registered at clinicaltrials.gov (NCT00562627) before onset of participant enrolment: http://clinicaltrials.gov/ct2/show/NCT00562627?term=spreng&rank=2 (April 21, 2010).