In stem cell transplantation, http://za.zalo.me/v3/verifyv2/pc?token=ocnsmjfpl0xy2f3bthznrs4a-hhq5q5spxtbk3o&continue=aiki-evolution.jp/yy-board/yybbs.cgi%3Flist=thread, you get healthy hematopoietic stem cells through a needle inserted into your vein.