CXCL8 and rheumatoid arthritis: Moreover, 10 hub targets (MMP9, IL1β, IFNG, IL10, ICAM1, CCL2, PTGS2, IL6, CXCL8, and JUN) of HLJDD in treating RA were identified through constructing the PPI network of the 41 common targets from HLJDD and RA.