Thanks for the responses. My inquiry is not about myself but my jw mother. She has shunned me for 27 years, and in a very rare "necessary family business" conversation, she informed me of the type of cancer she has and that she's chosen not to treat it with chemotherapy and radiation.
I had a feeling that her reasons for refusing treatment involved the blood issue, and that suspicion was confirmed with a little research. What I wasn't certain about was whether the necessary treatment included so-called Watch Tower approved fractions.
It's not surprising that she's willing to die for the Watch Tower. My mom has handed her life over to this cult for the past 40 years, giving up her independence and her children. Now it seems she's giving up her actual existance.