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: For the QoL-Colostomy , however , there was no significant difference between the control and experimental groups .
Example Output: not found

Example Input: Women who smoke and take oral contraceptives ( OCs ) have significantly increased risk of cardiovascular disease , but the exact mechanismsfor the increased risk are not known .
Example Output: oral contraceptives

Example Input: Gastrointestinal symptoms have been reported in association with myoelectrical dysrhythmia , where different types of gastric electrical activity have been described .
Example Output:
not found