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: MAIN MEASURES PTSD symptom severity was the primary outcome .
Example Output: not found

Example Input: Sample size was based on 80 % power to reject the null hypothesis that the cost/QALY gained would not exceed $ 50,000 .
Example Output: not found

Example Input: Both groups received 24 months of 1,200 mg of calcium and 400 IU of vitamin D daily and 35 mg of risedronate weekly , and the exercise group additionally had ST exercises twice weekly .
Example Output:
calcium, vitamin D, risedronate