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.

Ex Input:
Weights and heights were measured at the tri-monthly treatment visits for a period of one year .

Ex Output:
not found


Ex Input:
Seventeen patients on chronic digitalis and diuretic therapy were randomized to receive either flosequinan ( n = 9 ) or placebo ( n = 8 ) in a double-blind fashion .

Ex Output:
not found


Ex Input:
Assays in male adolescents and in Caco-2 cells .

Ex Output:

male adolescents