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]: No significant differences , within and between groups , were observed in the exercise-induced increase in the ratios para- and ortho-hydroxyantipyrine to antipyrine .
[A]: not found


[Q]: However , deterioration in some responders with time suggests the need for maintenance protocols .
[A]: not found


[Q]: A set of five factors were found to consistently predict depression at the following assessment .
[A]:
not found