Figure 1: Cyclophosphamide, doxorubicin, vincristine and tropisetron treatment regimen. Drug administration contains three cycles and each cycle includes 3 weeks (one week for drug administration and two weeks for rest recovery). Cyclophosphamide at the dose of 80 mg/kg, doxorubicin at the dose of 5.8 mg/ kg and vincristine at the dose of 0.3 mg/kg were injected intraperitoneally (i.p.) on day 1 of the first week of each cycle, while tropisetron at the dose of 5 mg/ kg was injected 1 hour prior to administration of these drugs.