per NMDP (formerly known as Be The Match):
Thanks to advancements in research and science, the majority of the transplants we facilitate today utilize a process called Peripheral Blood Stem Cell (PBSC) extraction instead of bone marrow extraction. Additionally, our user research has indicated that the term "bone marrow transplant" can be intimidating for people, leading them to shy away from donation. Therefore, we've shifted our focus to referring to these procedures as blood stem cell transplants, which encompasses both types of donations from unrelated adult donors.
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