What I am trying to say is they MUST have listed ALL potential risks associated with the procedure. I do not see any reason why they not to. If you have signed one of the form in US hospital, you would know how extensive that is.
For the benefit, they probably used 85% success rate to attract patient. But they only need to use the wording "reported by Dr. Xiao and we don't have independent verification". All the responsibility will be on Xiao.
So given the fact that those Dr.s have been in business for this kind of work for years, it is highly unlikely you can find anything.