In his fascinating book "Survival of the sickest" Dr Sharon Maolem states
... an ancient medical practice (bloodletting) that "modern" medical science dismissed out of hand is the only effective treatment for Hemochromatosis ...
The lesson for medical science is simple one - there is much more than the scientific community doesnt understand than there is that it does understand.
I think this is a amazing lesson of acting without deeply investigating what is going on! Blood letting - or simply bleeding patients off - is after all not a bad a option - it was in vogue before 20th century any way!