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.

Ex Input:
3CM participants also had more mental health visits and higher outpatient pharmacy costs .

Ex Output:
not found


Ex Input:
Referral occurred at any stage of the patients ' EECU admission .

Ex Output:
not found


Ex Input:
Participants were randomized to the SST or LA group .

Ex Output:

not found