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: Calcium solubility and absorption across Caco-2 cells were studied after the in vitro digestion of the diets .
Example Output: not found

Example Input: Antipyrine reacts quickly with hydroxyl radicals to form para- and ortho-hydroxyantipyrine .
Example Output: not found

Example Input: At the end of 1 year 24 group 1 ( 92.3 % ) and 23 group 2 ( 90.3 % ) patients had an improved drainage pattern .
Example Output:
not found