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.

We conclude that oral methotrexate did not slow down progression of muscle weakness but decreased serum creatine kinase activity .
not found

We expect the patients in the active recommendations group to experience a greater improvement in their depressive symptoms .
not found

Group 1 received a weekly session of posterior tibial nerve stimulation for 12 weeks and group 2 was the placebo group .

not found