ACTB and synovial sarcoma: The relative densitometry results showed that the levels of ATG5 (vs β-actin) and the LC3B-II/I ratio in tears were higher in patients with SS DE (5.06 ± 1.31 and 3.37 ± 1.08) than in patients with non-SS DE (1.44 ± 0.46 and 1.67 ± 0.40) and healthy controls (1.00 ± 0.35 and 1.00 ± 0.35) (P = 0.0001) (Fig. 1A).