GPT and Sjogren syndrome: AST: aspartate aminotransferase; ALT: alanine transaminase; ALP: alkaline phosphatase; CK: creatine kinase; CRP: C-reactive protein; Ig: immunoglobulin; CCP: cyclic citrullinated peptide; dsDNA: double-stranded DNA; RF: rheumatoid factor; SS: Sjögren syndrome; RP: RNA polymerase; SRP: signal recognition particle; SNRNP: small nuclear ribonucleoprotein; CENP: centromere protein; PH: potential of hydrogen; WBC: white blood cells