I will read the article later, but I just wanted to add something from my personal experience.
In a chance encounter, I ended up visiting with one of the leading medical advocates for bloddless surgery in California's SF Bay Area. They actually had billboards advertising the medical center on the main route to the Cow Palace, where JW conventions have been held for decades.
I recently spoke to him again and told him I had left. He was happy about that.
I asked him about blood. "When was the last time whole blood was administered"? He told me WWII era. ( wow ). Whole blood is never given anymore.
Then I asked if the only treatments given are "fractions"? He said yes.
So, bottom line, JWs "abstain from blood", but somehow firm up their consciences to allow them to accept the most up to date methods of transfusions to preserve life while accepting someone else's blood. Hypocrisy?