The science of stem cell research has demonstrated a major practical advance - a Colombian woman has become the first person to receive a whole organ transplant developed using her own cells. She had a damaged trachea - so could not breathe properly - and has received a transplanted trachea from a donor. It might have been rejected - but scientists used cells to trick her body into thinking it was its own. Anthony Hollander, professor of Rheumatology and Tissue Engineering at the University of Bristol, describes some of the methods used.
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