
Refractory ulcers: The role of tumor necrosis factor-α
Keywords: پنتوکسی فیلین; EGF; epidermal growth factor; IL-1; interleukin 1; MMP; matrix metalloproteinase; PG; pyoderma gangrenosum; PMN; polymorphonuclear leukocyte; PTX; pentoxifylline; TGF; transforming growth factor; TNF; tumor necrosis factor;