RT Journal Article SR Electronic T1 Minimal Anticipated Biological Effect Level of Anti-CD28 Receptor Antagonist JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 351 OP 351 DO 10.1124/jpet.115.1215HIc VO 355 IS 3 YR 2015 UL http://jpet.aspetjournals.org/content/355/3/351.4.abstract AB