2.1. Participants
A total of 21 patients (19 women and 2 men; age range of 21–53 years) clinically diagnosed with MMP were included in the study. They were randomly divided into two groups and received BoNT/A or saline injections. There were no significant differences in sex and age between the groups; thus, the homogeneity of the general characteristics between the groups was confirmed. There were no dropouts from either group during the 12-week study period. In addition, there were no reports of side effects during this study. The participants’ demographic characteristics are presented in 