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.

Example Input: No clinically serious adverse events were observed in any of the groups .
Example Output: not found

Example Input: During the first 6 months following a planned quit attempt , being abstinent in a particular week appears to be associated with lower levels of concurrent depressive symptoms .
Example Output: not found

Example Input: Outcomes improved with regular class attendance .
Example Output:
not found