Fig. 1

FBG concentration and its changes in sham-VNS and VNS groups. a FBG levels at baseline and at 4-month follow-up in the two groups. b Changes in FBG levels at 4-month follow-up in Sham-VNS and VNS groups. There were no significant differences in FBG levels between Sham-VNS and VNS groups. The FBG levels at 4-month follow-up were not significantly different from baseline values in both groups