FOXP3 and myasthenia gravis: Interestingly, in the patients within MG subgroups included in this study, there was no significant relationship between the FoxP3+ Treg cells and anti-AChR Ab levels, but there was a positive correlation with statistically significant between the Tr1 cell/CD4+ T cell ratio and the anti-AChR Ab level (r = 0.6889 ± 0.4414, p = 0.0401).