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

Answer: 40 of the normal infants


Question: It was therefore sought to determine whether regular intake of lime juice will ameliorate crisis , especially recurrent bone pain .

Answer: not found


Question: We performed a prospective randomized trial to evaluate the optimum duration of stenting after endopyelotomy .

Answer:
not found