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

[EX Q]: A tendency towards increased plasma 6-keto-prostaglandin F1 alpha concentration and decreased serum thromboxane B2 concentration was found during the period of regular exercise , but prostaglandin E2 concentrations remained unchanged .
[EX A]: not found

[EX Q]: Assessments of JA skills , SP skills , mother-child interactions , and language development were collected at 4 time points : pre- and postintervention and 6 and 12 months postintervention by independent testers .
[EX A]:
not found