NAP1L2 and osteoporosis: A significant negative correlation was elicited between NAP1L2 expression and bone mineral density (BMD), as well as the CT value for the L1 lumbar in osteoporosis patients (Figure 6j,k); however, no significant correlation between NAP1L2 expression and bone mineral density (BMD) or CT value in the age‐paired healthy donors was observed (Figure 6l).