Abbreviations
P-ANCA: perinuclear anti-neutrophil cytoplasmic antibodies, C-ANCA: Cytoplasmic anti-neutrophil cytoplasmic antibodies, ANA: antinuclear cytoplasmic antibody, RF: rheumatoid factor, anti-CCP: Anti-cyclic citrullinated peptides, anti-SSA/Ro: anti–Sjögren’s syndrome-related antigen A, anti-SSB/La: anti–Sjögren’s syndrome-related antigen B, Anti-RNP: anti Ribonucleoprotein