In medical studies, the efficacy of medical treatments (called interventions) is evaluated within a group of study participants. You will be given a sentence of a study report in which your task is to list the phrases that describe the intervention(s) of the study. You should list the phrase in the same order that they appear in the text, separated by commas. If no information about the interventions is mentioned, just answer with "not found". Interventions are: a specific drug, surgery, talking therapy, a lifestyle modification, control or placebo treatment. Do not include details, dosages, frequency and duration, intervention mentions that are not in an informative span of text.

[Q]: Sample size was based on 80 % power to reject the null hypothesis that the cost/QALY gained would not exceed $ 50,000 .
[A]: not found


[Q]: We conclude that granisetron is a better anti-emetic than perphenazine for the long-term prevention of post-operative vomiting in children undergoing general anaesthesia for tonsillectomy .
[A]: granisetron, perphenazine


[Q]: The course of depression in recent onset rheumatoid arthritis : the predictive role of disability , illness perceptions , pain and coping .
[A]:
not found