TRIM21 and dry eye syndrome: Keratoconjunctivitis sicca (p=0.04), elevated erythrocyte sedimentation rate (p=0.036), leukopenia (p=0.025), positive antibodies: anti-Ro/SSA (p=0.029), anti-Ro/SSA, anti-La/SSB (p=0.037), antinuclear (p=0.01), anti-extractable nuclear antigen (p=0.04), positive rheumatoid factor (p=0.032), positive elevated IgG levels (p=0.03) and abnormal unstimulated whole salivary flow rate (p=0.002) were predictive of a positive MSGB.