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. Author manuscript; available in PMC: 2020 Sep 9.
Published in final edited form as: J Am Acad Dermatol. 2020 Feb 14;83(1):172–178. doi: 10.1016/j.jaad.2020.02.020

Fig 1.

Fig 1.

Representative C3d (A) positive and (B) negative immunohistochemistry. (B) Positive C3d testing is indicated by uniform red linear staining along the dermal-epidermal junction.