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Immunostaining of interferon-γ (indicated by arrows) in submandibular glands of (A) control (magnification, ×400), (B) TGP (magnification, ×200), (C) HCQ (magnification, ×100) and (D) combined treatment group mice (magnification, ×200). TGP, total glucosides of peony; HCQ, hydroxychloroquine.
