Comparison of ondansetron and tropisetron in preventing postoperative nausea and vomiting

From the Department of Computer Network (Wang R), Technology School, Jilin Business and Technology College, Changchun, Jilin; from the Department of Anesthesiology (Song, Chen, Wang N); and from the Department of Urology (Wang J), The First Hospital of Jilin University, Changchun, China.

From the Department of Computer Network (Wang R), Technology School, Jilin Business and Technology College, Changchun, Jilin; from the Department of Anesthesiology (Song, Chen, Wang N); and from the Department of Urology (Wang J), The First Hospital of Jilin University, Changchun, China.

From the Department of Computer Network (Wang R), Technology School, Jilin Business and Technology College, Changchun, Jilin; from the Department of Anesthesiology (Song, Chen, Wang N); and from the Department of Urology (Wang J), The First Hospital of Jilin University, Changchun, China.

From the Department of Computer Network (Wang R), Technology School, Jilin Business and Technology College, Changchun, Jilin; from the Department of Anesthesiology (Song, Chen, Wang N); and from the Department of Urology (Wang J), The First Hospital of Jilin University, Changchun, China.

From the Department of Computer Network (Wang R), Technology School, Jilin Business and Technology College, Changchun, Jilin; from the Department of Anesthesiology (Song, Chen, Wang N); and from the Department of Urology (Wang J), The First Hospital of Jilin University, Changchun, China.