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:
A greater proportion of children in the ASD group used special educational services ( 76 % vs. 7 % in the control group , P < .05 ) .

Ex Output:
not found


Ex Input:
Evaluation was performed in each group at baseline and after posterior tibial nerve stimulation to compare clinical and urodynamic findings .

Ex Output:
not found


Ex Input:
CALGB 8642 randomizes previously untreated metastatic breast cancer patients either to one of several Phase II agents given for up to four cycles and then followed by standard cyclophosphamide-doxorubicin-5-fluorouracil , or to immediate treatment with standard cyclophosphamide-doxorubicin-5-fluorouracil .

Ex Output:

untreated metastatic breast cancer patients