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.

Input: Consider Input: However , among OC users , nonsmokers had significantly greater heart rate and diastolic blood pressure reactivity to stress .

Output: OC users


Input: Consider Input: Participants were 195 Veterans .

Output: 195 Veterans


Input: Consider Input: Patients in the 40K arm had a higher global quality of life ( QOL ) at baseline for unclear reasons , whereas patients in the 120K arm had a greater global QOL improvement during the study , so end-of-study QOL was equivalent .


Output: not found