(a)
(b)
(c)
(d)
Figure 1: Serum OPN level in the AR group was significantly higher than that in the control group (a). In contrast, serum miR-181a level in the AR group was significantly lower than that in the control group (b). Serum miR-181a level was significantly associated with serum OPN level in both AR (c) and control (d); .