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: Role of posterior tibial nerve stimulation in the treatment of refractory monosymptomatic nocturnal enuresis : a pilot study .
Example Output: posterior tibial nerve stimulation

Example Input: A pilot study on the effect of progressive muscle relaxation training of patients after stoma surgery .
Example Output: progressive muscle relaxation training

Example Input: Role of posterior tibial nerve stimulation in the treatment of refractory monosymptomatic nocturnal enuresis : a pilot study .
Example Output:
posterior tibial nerve stimulation