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.

Example Input: In adjusted analyses , parents who reported that their child had ASD did not have significantly higher out-of-pocket costs or spend more time on caregiving activities compared with control parents .
Example Output: parents who reported that their child had ASD

Example Input: Subjects who were > or =50 % adherent to exercise were less likely to lose BMD at the total hip ( chi-square [ 1 ] = 4.66 , p = 0.03 ) and femoral neck ( chi-square [ 1 ] = 4.63 , p = 0.03 ) .
Example Output: not found

Example Input: Antipyretic treatment had no effect on fever clearance and therefore should be used cautiously in the treatment of malaria .
Example Output:
not found