I have one tip about the link to the anti xiao letter above: use this site to link to it:
https://anonym.to/
This way we are not helping to spread the word by providing a link (even if it IS nofollow), which is what the search engines use to determine relevancy.
Sorry if this sounds like it isn't needed, but I assure you, it is. I have a background in search engine optimization and just trying to make sure that this procedure isn't falsely slandered.
In fact, I used to work with someone that worked with natural medicine doctors on reputation management. It seems there are organizations out there that actively work to displace credible results and move "quack watch" results up the search engine for any of the doctor's search terms (i.e. their name). It's big business to call out free, natural remedies as "hocum".