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Recovery of lymphocytes from clotted blood for HLA typing

A method to recover lymphoid cells from clotted blood for the microcytotoxicity test used in HLA typing is described. The procedure consists of disruption of the clotted blood followed by Ficoll-Hypaque gradient purification of the mononuclear cells. The results of HLA typing of lymphocytes from unclotted and clotted blood were identical.

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