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Immunostaining of clinical ccRCC tissues for SULF‐2. (a) Positive SULF‐2 expression in cancer tissues. (i) The expression level is judged as ++. (ii) The expression level is judged as +. (b) Negative SULF‐2 expression in cancer tissue judged as −. (c) Normal tissue. Images were obtained using a BX51 TRF microscope (Olympus, Tokyo, Japan).
