Patient-controlled analgesia with lornoxicam vs. dipyrone for acute postoperative pain relief after septorhinoplasty: a prospective, randomized, double-blind, placebo-controlled study - Sener, M; Yilmazer, C; Yilmaz, I; Caliskan, E; Donmez, A; Arslan, G (Eur J Anaesthesiol, 2008)