VEGFA and type 2 diabetes mellitus: The levels of transforming growth factor β 1 (TGF-β1), vascular endothelial growth factor (VEGF), collagen type I, and collagen type III in type 2 diabetic Goto-Kakizaki rats after treated with ointment base for Ya-Samarn-Phlae tulle-gras dressings (YaSP).