An increased body mass index is no risk factor for postoperative nausea and vomiting. A systematic review and results of original data. - Kranke,P.; Apefel,C.C.; Papenfuss,T.; Rauch,S.; Lobmann,U.; Rubsam,B.; Greim,C.A.; Roewer,N. (Acta Anaesthesiol Scand, 2001)