TY - JOUR T1 - IL-21 sustains CD28 expression on IL-15-activated human naive CD8 + T cells JF - Journal of Immunology Y1 - 2005 A1 - Alves, N.L. A1 - Arosa, F.A. A1 - van Lier, R.A.W. VL - 175 UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-23244444668&partnerID=40&md5=78cacb85a67a0256178150e1760e6a1c IS - 2 N1 - Cited By (since 1996): 51Export Date: 18 March 2013Source: Scopus ER -