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Periodic acid Schiff-stained sections of the kidney of Bbs2−/−, Bbs4−/− mice, and wild-type (WT) controls. A–C: 12-wk-old mice. D–F: 40-wk-old mice. Arrows indicate the presence of inflammation and arrowheads the cysts. Each photograph is representative of 4–6 animals per group. BBS or Bbs, Bardet-Biedl syndrome.
