Not sure why but the article seems to have disappeared from their website and I'm not able to locate that specific one again. I did do a search on the link above and found a good list of articles and videos when I did a search using "small fiber neuropathy from cervical injury".
https://www.spine-health.com/search?keys=small+fiber+neuropathy+from+cervical+injury
You might want to play with different search terms to find something more specific.