Fig. 4
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12891-019-2825-4/MediaObjects/12891_2019_2825_Fig4_HTML.png)
For the LF specimens in the three groups, S100 staining was absent in the dural layer (a, c and e) and were stained in the dorsal layer (b, d and f)
For the LF specimens in the three groups, S100 staining was absent in the dural layer (a, c and e) and were stained in the dorsal layer (b, d and f)