[1] Purdue Univ, Biochem & Mol Biol Program, Dept Vet Pathobiol, Lab Immunol & Hematopoiesis, W Lafayette, IN 47907 USA
[2] Stanford Univ, Sch Med, Dept Pathol, Lab Immunol & Vasc Biol, Stanford, CA 94305 USA
[3] Vet Affairs Palo Alto Hlth Care Syst, Ctr Mol Biol & Med, Palo Alto, CA 94304 USA