http://www.w3.org/ns/prov#value | - Patients also complete symptom diaries documenting the following: number of episodes (an emetic episode is defined as a simple vomit or retch, or any number of continuous vomits or retches; distinct episodes that are separated by at least 1 minute) of vomiting or retching including the date and time; worst and average degree of nausea (recorded every 2 hours while awake during the first 24 hours a
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