FABP5 and Keratoconjunctivitis sicca: Since our previous research suggested that the accumulation of lipid peroxidation products causes damage to the lacrimal glands in patients with SS, we decided to focus on the role of E-FABP (FABP5), which is expressed in the oral mucosa, ocular surface, and exocrine glands as a diagnostic marker for dry eyes in patients with SS in the current study.