TASK DEFINITION: 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.
PROBLEM: However , deterioration in some responders with time suggests the need for maintenance protocols .

SOLUTION: not found

PROBLEM: Though this prolongation of remission was not significant in the bestatin group compared to the control group in the 15-49 yr age group , in the 50-65 yr age group it was significantly longer .

SOLUTION: bestatin, control

PROBLEM: Trials involving larger patient populations will be necessary to confirm the results of this preliminary study and to determine the extent of clinical improvement , subpopulations benefited , role in heart failure therapeutics , and so forth .

SOLUTION:
not found