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Skeletal analysis of Fgf18−/− embryos. Skeletal preparations of whole structures (A,B), hindlimbs (C,D), and crania (E–H) at 18.5 dpc (A–D,G,H) and 16.5 dpc (E,F) stained with Alizarin red and Alcian blue in wild-type (A,C,E,G) and Fgf18−/− (B,D,F,H) embryos.
