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Immunohistochemical detection of Bax and Bcl-2 in minor salivary gland (MSG) biopsies from patients with SS (a,c) and control individuals (b,d). Positive cells stained brown using immunoperoxidase staining, haematoxylin was used as a counterstain on paraffin-embedded tissue sections. (Mag., a,b,d, ×400; c, ×200.)
