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.

Ex Input:
Since this new technique is based solely upon exhalation , anomalies associated with inspiration and breath holding do not affect results .

Ex Output:
not found


Ex 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 .

Ex Output:
calcium, vitamin D, risedronate


Ex Input:
Multicenter , randomized , controlled , two arm-parallel , clinical trial .

Ex Output:

not found