instruction:
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.
question:
The end point of CALGB 8642 is to assess the difference in survival , toxicity , and overall response when limited exposure to Phase II agents precedes standard chemotherapy .
answer:
not found


question:
In contrast , the number of wet nights and urodynamic parameters did not change significantly in group 2 .
answer:
not found


question:
A tendency towards increased plasma 6-keto-prostaglandin F1 alpha concentration and decreased serum thromboxane B2 concentration was found during the period of regular exercise , but prostaglandin E2 concentrations remained unchanged .
answer:

not found