PT - JOURNAL ARTICLE AU - Krummel, Matthew F. AU - Allison, James P. TI - Pillars Article: CD28 and CTLA-4 Have Opposing Effects on the Response of T Cells to Stimulation. <em>The Journal of Experimental Medicine</em>. 1995. 182: 459–465 DP - 2011 Oct 01 TA - The Journal of Immunology PG - 3459--3465 VI - 187 IP - 7 4099 - http://www.jimmunol.org/content/187/7/3459.short 4100 - http://www.jimmunol.org/content/187/7/3459.full SO - J. Immunol.2011 Oct 01; 187