Intravenous dolasetron and ondansetron in prevention of postoperative nausea and vomiting: a multicenter, double-blind, placebo-controlled study. - Korttila,K.; Clergue,F.; Leeser,J.; Feiss,P.; Olthoff,D.; Payeur-Michel,C.; Wessel,P.; Nave,S.; Hahne,W.; Brown,R. (Acta Anaesthesiol Scand, 1997)