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.
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Question: Sixty healthy women , half of whom had been using OCs for at least the previous 6 months , participated in the study .

Answer: not found


Question: After 24 months , women who took medications without exercising had significant improvements in BMD at the total hip ( +1.81 % ) and spine ( +2.85 % ) and significant decreases in Alkphase B ( -8.7 % ) and serum NTx ( -16.7 % ) .

Answer: not found


Question: During the first 6 months following a planned quit attempt , being abstinent in a particular week appears to be associated with lower levels of concurrent depressive symptoms .

Answer:
not found