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: We investigated whether 5 to 20mg per week oral methotrexate could slow down disease progression in 44 patients with inclusion body myositis in a randomized double-blind placebo-controlled study over 48 weeks .
Example Output: 44 patients with inclusion body myositis

Example Input: In contrast , the number of wet nights and urodynamic parameters did not change significantly in group 2 .
Example Output: not found

Example Input: Serum creatine kinase activity decreased significantly in the methotrexate group .
Example Output:
not found