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]: A 20-min set of audiotaped instructions on progressive muscle relaxation training ( PMRT ) was given to the patients in the experimental group for home practice .
[EX A]: progressive muscle relaxation training, PMRT

[EX Q]: Participants were 236 heavy drinking smokers in a randomized clinical trial testing the efficacy of incorporating brief alcohol intervention into smoking cessation treatment .
[EX A]: not found

[EX Q]: There were no significant differences in serum levels of cholesterol , total protein , lactate dehydrogenase , aspartate aminotransferase , alanine aminotransferase , Na⁺ , Cl⁻ , K⁺ , and Ca²⁺ .
[EX A]:
not found