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: Additionally , because prolonged breath holding is not required , measurements can readily be made in dyspnoeic patients .

A: not found
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Q: Effects of mild physical exercise on serum lipoproteins and metabolites of arachidonic acid : a controlled randomised trial in middle aged men .

A: physical exercise
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Q: The 2 groups were comparable in baseline clinical and urodynamic data .

A:
not found
****