Comparison of the effects of preoperative and intraoperative intravenous application of dexketoprofen on postoperative analgesia in septorhinoplasty patients: randomised double blind clinical trial - Ozer, A B; Erhan, O L; Keles, E; Demirel, I; Bestas, A; Gunduz, G (Eur Rev Med Pharmacol Sci, 2012)