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 course of depression in recent onset rheumatoid arthritis : the predictive role of disability , illness perceptions , pain and coping .
Example Output: rheumatoid arthritis

Example Input: Evaluation was performed in each group at baseline and after posterior tibial nerve stimulation to compare clinical and urodynamic findings .
Example Output: not found

Example Input: On two days , 60 COPD patients underwent dyspnea evaluation ( VAS score ) and pulmonary function testing at baseline and one hour after placebo or 300μg indacaterol administration .
Example Output:
60 COPD patients