TISSUE TYPING

Sir, - I wish to respond to your article about the BTSB which appeared on the front page of your newspaper on April 9th

Sir, - I wish to respond to your article about the BTSB which appeared on the front page of your newspaper on April 9th. The article states: "The company (Paternity Test Services) also carries out tissue typing for bone marrow transplants."

This is untrue. All tissue typing for family donors and for unrelated donors for bone marrow transplantation has always been, and is currently, carried out in the tissue typing laboratory of the BTSB under the direction of Dr Emer Lawlor. Financial support for the unrelated donor testing has been provided by the Irish Unrelated Bone Marrow Panel. - Yours, etc.,

FRCPI, FRCPath, FRCPEdin,

Director, National Bone

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Marrow

Transplant Unit,

St James Hospital,

Dublin 8.