In medical studies, treatments are tested 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 give information about the participants of the study. You should list the phrases in the same order that they appear in the text, separated by commas. If no information about the participants is mentioned, just output "not found". Relevant information about participants include: gender, medical conditions, location, number of people participating. Do not contain participant mentions without relevant information.

[Q]: Randomized trial of 20-week aquatic classes .
[A]: not found


[Q]: Improvement in outcomes appeared to be more closely associated with the patient 's severity of psychological distress .
[A]: not found


[Q]: These results are not concordant with the view that intentional smoking abstinence exacerbates depressive symptoms .
[A]:
not found