<qa>  What is the ideal tool for assessing nausea and vomiting?It remains difficult to compare clinical studies of nausea and vomiting because of the variety of measurement tools utilized and the variable time periods that were monitored following chemotherapy. The ideal tool would include assessment of: 1. duration and severity of nausea 2. frequency, duration, and severity of vomitingretching 3. number of antiemetics utilized 4. impact of nausea and vomiting on quality of life 5. adverse effects experienced 