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.

Q: The pain in sickle cell anemia ( SCA ) is often triggered by dehydration , acidosis , and fever that are usually due to malaria .

A: not found
****
Q: One third were nonsmokers .

A: not found
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Q: The purpose of this study was to examine the effect of chronic cigarette smoking , acute nicotine administration , and OC use on cardiovascular and lipid reactivity .

A:
not found
****