instruction:
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.
question:
Participants were randomized to the SST or LA group .
answer:
SST, LA


question:
Daily supplementation significantly increased plasma concentrations of alpha-tocopherol and beta-carotene in the supplemented group ( Delta 14.4 ( SE 3.2 ) and 0.4 ( se 0.1 ) micromol/l ; P < 0.001 and P < 0.01 ) .
answer:
not found


question:
However , this approach can not account for potential third variables between participants that may affect both smoking and depression .
answer:

not found


