last antigenic stimulation CD45RA on human CD8 T cells is sensitive to the time elapsed since the

Information about subscriptions and ASH membership may be found online at: Copyright 2007 by The American Society of Hematology; all rights reserved. 200, Washington DC 20036.semimonthly by the American Society of Hematology, 1900 M St, NW, Suite Blood (print ISSN 0006-4971, online ISSN 1528-0020), is published