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.

Example Input: The physiotherapy group had a 4 % ( 95 % CI -18 % to 9 % ) lower rate of admission to hospital than the control group and a 4 % ( 95 % CI -6 % to 13 % ) higher rate of re-presentation to the ED , which were statistically non-significant ( p≥0.45 ) .
Example Output: not found

Example Input: Studies in animals show good healing after 1 to 2 weeks of ureterotomy .
Example Output: animals

Example Input: Oral contraceptive use is associated with increased cardiovascular reactivity in nonsmokers .
Example Output:
not found

