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.

Q: No significant differences in resolution of symptoms were noted between treatment groups .

A: not found
****
Q: A greater proportion of children in the ASD group used special educational services ( 76 % vs. 7 % in the control group , P < .05 ) .

A: not found
****
Q: Quantitative muscle strength testing sum scores declined in both treatment groups , -0.2 % for methotrexate and -3.4 % for placebo ( 95 % confidence interval = -2.5 % to +9.1 % for difference ) .

A:
not found
****