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: Oral contraceptive use is associated with increased cardiovascular reactivity in nonsmokers .
Example Output: not found

Example Input: 21 patients ( age 0-2 months ) and 40 healthy infants ( age 0-2 months ) were investigated .
Example Output: not found

Example Input: Subjects were randomly divided in two groups : supplementation ( n 11 ) with 100 mg dl-alpha-tocopheryl acetate , 200 mg ascorbic acid , and 2 mg beta-carotene , and placebo ( n 9 ) .
Example Output:
dl-alpha-tocopheryl acetate, ascorbic, beta-carotene, placebo