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Immunohistochemical examination of URAT1 expression in kidney in the second stage: (a) C, control; (b) M, model; (c) A, allopurinol; (d) PF-1, combination 1; (e) PF-2, combination 2; (f) PF-3, combination 3; (g) PF-4, combination 4 (images under ×400 optical magnification).
