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.

[EX Q]: Participating physicians were randomized to either the demonstration or the control arm , and patients were assigned to a study arm based on the randomization of their physicians .
[EX A]: not found

[EX Q]: To study the effects of physical exercise on biochemical risk factors for ischaemic heart disease 31 healthy middle aged men undertook regular physical exercise for two months and 29 served as controls in a randomised trial .
[EX A]: physical exercise

[EX Q]: Baseline microalbuminuria predicted subsequent clinical proteinuria for the study participants overall ( adjusted odds ratio [ OR ] , 17.5 ; 95 % confidence interval [ CI ] , 12.6 to 24.4 ) , in participants without diabetes ( OR , 16.7 ; 95 % CI , 8.6 to 32.4 ) , and in participants with diabetes ( OR , 18.2 ; 95 % CI , 12.4 to 26.7 ) .
[EX A]:
not found