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Figure 1: Normal oral mucosa. Immunoperoxidase stain for type IV collagen, hematoxylin counterstain, ×40. Type IV collagen was immunolocalized along the basement membrane of the mucosal epithelium and vascular channels

Figure 1: Normal oral mucosa. Immunoperoxidase stain for type IV collagen, hematoxylin counterstain, ×40. Type IV collagen was immunolocalized along the basement membrane of the mucosal epithelium and vascular channels