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Interior view: a man and a woman are extracting blood cells from tissue samples to determine compatibility between tissue donor and recipient. Verso: WHO/15301. EURO. Immunology. A person who receives a transplant must have a tissue type that closely resembles the type of the donor. Cells for tissue typing are obtained from the blood by means of special techniques. These doctors are preparing blood cells in the Hospital Saint-Louis labratories, Paris.
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World Health Organization; World Health Organization website