FGF7 and Behcet disease: During the wound healing process, PDGF-BB not only contributes to angiogenesis but also regulates the proliferation, migration, and collagen deposition of fibroblasts,37 and has a certain regulatory effect on their production of KGF.29 Although IL-1β is the most effective factor to promote the secretion of KGF from fibroblasts,38 we did not observe significant differences in IL-1β protein expression of plasma and skin wound tissues between the control and the BD groups (Fig. S13).