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.

[EX Q]: By lowering peripheral airway smooth muscle tone , bronchodilators should decrease dynamic hyperinflation , gas trapping , and possibly dyspnea at rest .
[EX A]: bronchodilators

[EX Q]: Eligible patients were children and adolescents with HFA .
[EX A]: not found

[EX Q]: The addition of chronic vasodilator therapy with flosequinan to standard digitalis-diuretic regimens is capable of inducing clinical improvement in patients with moderate to severe chronic heart failure .
[EX A]:
flosequinan