to prove that Fang is cheating on the issues?

This is not the issue of supporting or not supporting 肖氏反射弧. It is the legal issue about evidence which court granted to be false or true, legal or illegal.

This open letter drafted by Xiao will be presented to the court as evidence.
Those who sign the above letter will put him or her as a witness before judges in the court.

Think it first before you sign on it: Will you put your name to support a possibly false 病例报道 in the court just because you sypathize 肖传国?