This is a horrible criteria. People found blood letting useful as a treatment. Maybe that was the only or the best tool available to them. Maybe it was actuall

This is a horrible criteria. People found blood letting useful as a treatment. Maybe that was the only or the best tool available to them. Maybe it was actually beneficial. Bloodletting's Benefits http://www.webmd.com/men/news/20040910/bloodlettings-benefits http://www.webmd.com/men/news/20040910/bloodlettings-benefit...