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ON THE COVER
Graphic art by New York artist
Dan Durso (durso10{at}yahoo.com)
representing expression of tissue-restricted
antigens by medullary thymic
epithelial cells, which increases progressively
as the cells differentiate.
See related article by Derbinski et al.
(page 33 and commentary by Gillard
and Farr (page 15).
[Table of Contents]
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