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: Previous analyses that focused on health care underestimated this economic burden , particularly for school systems .
Example Output: not found

Example Input: These were initial level of depression , disability , pain , beliefs about the consequences of arthritis and coping strategies .
Example Output: not found

Example Input: There were 4 cases with possible systemic fungal infection in the itraconazole group , and there were 8 possible and 3 probable cases in the fluconazole group .
Example Output:
not found