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: The physiotherapy group had a 4 % ( 95 % CI -18 % to 9 % ) lower rate of admission to hospital than the control group and a 4 % ( 95 % CI -6 % to 13 % ) higher rate of re-presentation to the ED , which were statistically non-significant ( p0.45 ) .
Example Output: physiotherapy, control

Example Input: Three hundred forty-one Tanzanian preschool children were randomly assigned to levamisole or placebo treatment given at three-month intervals .
Example Output: levamisole, placebo

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