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: Risk factors retained in the model included poor performance status , absolute neutrophil count < or =2.0 x 10 ( 9 ) cells/L in the previous cycle , the first cycle of chemotherapy , DOX versus PLD and advanced age .
Example Output: not found

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

Example Input: This study retrospectively analyzed changes of proteinuria over 4.5 yr in the HOPE ( Heart Outcomes and Prevention Evaluation ) study , which compared ramipril 's effects to placebo in 9297 participants , including 3577 with diabetes and 1956 with microalbuminuria .
Example Output:
9297 participants , including 3577 with diabetes and 1956 with microalbuminuria