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.

Q: 353 children with positive throat swabs for GABHS were randomised to amoxicillin ( n = 177 ) or penicillin V ( n = 176 ) .

A: not found
****
Q: Interventions were conducted 30 min daily for 5-6 weeks .

A: not found
****
Q: A 3 day balance was performed at the end of each period , and fasting blood samples were collected .

A:
not found
****