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:
Short-term phasic activity was only found in 13 out of 40 of the normal infants ( 32.5 % ) .

Ex Output:
40 of the normal infants


Ex Input:
Posterior tibial nerve stimulation can be a viable treatment option in some patients with refractory monosymptomatic nocturnal enuresis .

Ex Output:
patients with refractory monosymptomatic nocturnal enuresis


Ex Input:
Serotonin is involved in both disorders , and selective serotonin reuptake inhibitors ( SSRIs ) can modulate cognitive flexibility and improve behavior in both disorders .

Ex Output:

not found