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]: Two weeks seems to be a sufficient duration to allow functional restoration across the ureteropelvic junction after endopyelotomy and decrease stent related complications .
[EX A]: not found

[EX Q]: At 3-month followup the number of patients with a partial or full response in group 1 had decreased from 11 ( 78.6 % ) to 6 ( 42.9 % ) .
[EX A]: not found

[EX Q]: The upper 95 % CL for the differences in positive cultures between the antibiotics was 4.9 % at days 3-6 , 6.5 % at days 12-16 and 8.5 % at days 26-36 .
[EX A]:
not found