Abstract
Recent thymic emigrants can be identified by T cell receptor excision
circles (TRECs) formed during T-cell receptor rearrangement.
Decreasing numbers of TRECs have been observed with
aging and in human immunodeficiency virus (HIV)-1 infected
individuals, suggesting for thymic impairment. Here, we show
that in healthy individuals, declining thymic output will affect
the TREC content only when
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