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:
Both groups received 24 months of 1,200 mg of calcium and 400 IU of vitamin D daily and 35 mg of risedronate weekly , and the exercise group additionally had ST exercises twice weekly .

Ex Output:
not found


Ex Input:
There was a 50 % response if patients had thrombocytopenia grade 3/4 ( versus 7.1 % , P = < 0.01 ) .

Ex Output:
not found


Ex Input:
Economic evaluation of aquatic exercise for persons with osteoarthritis .

Ex Output:

persons with osteoarthritis