CJCP     2010 12 (10):  812-815    ISSN: 1008-8830  CN: 43-1301/R Protection of PD-1 against LPS-induced endotoxemia and the underlying mechanism YANG Li-Fen, HE Fang, ZHANG Jian, YIN Fei Department of Pediatrics, Xiangya Hospital, Central South University, Changsha 410008, China. Email:yf2323@hotmail.com Received: null  Revised: null  Online: null Supporting info