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]: During the course of therapy , a modest improvement in the symptom scores and functional classification of the flosequinan-treated patients was observed .
[EX A]: flosequinan-treated

[EX Q]: The mean hematocrit of the subjects ( 26.23±2.03 % ) at the end of the study was also higher , p < 0.001 .
[EX A]: not found

[EX Q]: A persistent phasic activity pattern was found in 19 of the 21 patients , high frequency phasic activity in 11 of the 21 patients .
[EX A]:
not found