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: Patients had to have histologically documented measurable breast cancer and a performance status of 0-1 .
Example Output: not found

Example Input: Patients could not have had prior chemotherapy for metastatic disease .
Example Output: not found

Example Input: Phase III study of two different dosing schedules of erythropoietin in anemic patients with cancer .
Example Output:
erythropoietin