I must say however - I have personally known dubbies, including my mother, and an uncle who refused blood.
For hemorraging ulcers, cancer and heart bypass surgery, among others. In all of these the doctors did remark on how unusually well they were doing. When others were still lying about looking dreadful.
This is still ANECDOTAL evidence - that is: all I can say is what I saw and experienced. But saying that, if what we see and experience is to be dismissed as anecdotal, and therefore not provable, we might as well shut the lawcourts, and stop asking for testimony from witnesses.
Even worse, why not dismiss the testimony of child abuse victims - mere anecdotal evidence, non corroborated??
HB