1. CTLA-4;Egen,2002
2. The B7-CD28 superfamily;Sharpe,2002
3. The B7 family revisited;Greenwald,2005
4. BTLA is a lymphocyte inhibitory receptor with similarities to CTLA-4 and PD-1;Watanabe,2003
5. An inhibitory Ig superfamily protein expressed by lymphocytes and APCs is also an early marker of thymocyte positive selection;Han,2004