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

Example Input: This is the first study to document the importance of illness perceptions in recent onset RA .
Example Output: not found

Example Input: Mean followup was 22.3 ( range 12 to 36 ) and 21.3 months ( range 12 to 35 ) in groups 1 and 2 , respectively .
Example Output:
not found