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: Rheumatic fever is a preventable chronic disease preceded by group A beta-haemolytic streptococcal ( GABHS ) pharyngitis .
Example Output: not found

Example Input: In addition , supplementation did not affect the exercise-induced increase in thiobarbituric acid reactive substances in plasma .
Example Output: not found

Example Input: The Quality of Well-Being Scale ( QWB ) and Current Health Desirability Rating ( CHDR ) were used for economic evaluation , supplemented by the arthritis-specific Health Assessment Questionnaire ( HAQ ) , Center for Epidemiologic Studies-Depression Scale ( CES-D ) , and Perceived Quality of Life Scale ( PQOL ) collected at baseline and postclass .
Example Output:
not found