%0 Journal Article %1 Schraven2008 %A Schraven, B %A Kalinke, U %D 2008 %E Immunity, %J Immunity %K kalinke %N 5 %P 591-595 %T CD28 superagonists: what makes the difference in humans? %U http://www.ncbi.nlm.nih.gov/pubmed/18482560 %V 28