@article {4165,
	title = {IL-21 sustains CD28 expression on IL-15-activated human naive CD8 + T cells},
	journal = {Journal of Immunology},
	volume = {175},
	year = {2005},
	note = {Cited By (since 1996): 51Export Date: 18 March 2013Source: Scopus},
	month = {2005///},
	pages = {755 - 762},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-23244444668\&partnerID=40\&md5=78cacb85a67a0256178150e1760e6a1c},
	author = {Alves, N.L. and Arosa, F.A. and van Lier, R.A.W.}
}
