Once again, you and I share an interest, Orphan Crow.
"bloodless medicine" has been founded and maintained by the Watchtower Society itself
I found that out as well. As with many other things, wts steps up and takes credit for certain things they did and did not do, while at other times they pretend as though others did things they did. They flip back and forth between these strategies as the situation suits their needs. (They do this with the Holocaust, neurolinguistic programming, and the US civil rights movement, among other things. It's a standard strategy of theirs.)
I've found a high level of dishonesty among "bloodless medicine" proponents. The dishonesty centers upon their ties to wts/jws. They predictably deny their sympathies or outright involvement with the cult, while presenting their information at conferences and online.
I have come to regard "bloodless medicine" as comparable to Scientology's practice of not allowing women to make noise during labor, or sweat lodges to cure cancer.
Medical professionals use "unusual cases" to learn things, so sometimes you will see a journal article about a particular case. For example, they may learn the efficacy of alternative approaches--something they could not normally learn in an ethical research study where they cannot use humans as sacrifices. j-dubs misconstrue this as validation--"doctors are learning we are right."