9Pierre S,Benais H,Pouymayou J.Apfel's simplified score may favourably predict the risk of postoperative nausea and vomiting[J].Can J Anaesth,2002,49(3):237-242.
10Millo J,Siddons M,Innes R,et al.Randomised double-blind comparison of ondansetron and droperidol to prevent postoperative nausea and vomiting associated with patient-controlled analgesia[J].Anaesthesia,2001,56:60-65.
