
Keywords: CTLs; CD8+ T lymphocytes; ELISA; enzyme-linked immunosorbent assay; ITP; immune thrombocytopenia; IBD; inflammatory bowel disease; OA; osteoarthritis; PGRN; progranulin; rPGRN; recombinant progranulin; RA; rheumatoid arthritis; SLE; systemic lupus erythem