Thanks for the great insights, links and info - Orphan, Finkelstein, Giordano.
I was curious to phone one of these Bloodless medicine hospitals, to ask if they would affirm that there ARE cases where a person needs actual blood, and ... i'm not kidding ,the receptionist that answered - to me, totally seemed like a JW, seemed to take personal umbrage to my question, expressed discomfort and annoyance, etc.