@article {542331,
	title = {SnapShot: B7/CD28 costimulation.},
	journal = {Cell},
	volume = {137},
	number = {5},
	year = {2009},
	month = {2009 May 29},
	pages = {974-4.e1},
	keywords = {Animals, Antigen-Presenting Cells, Antigens, CD28, Antigens, CD80, Humans, T-Lymphocytes},
	issn = {1097-4172},
	doi = {10.1016/j.cell.2009.05.015},
	author = {Paterson, Alison M and Vanguri, Vijay K and Sharpe, Arlene H}
}
