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Representative histological sections and calcein/demeclocycline labeling of femoral sections from 10 day and 1, 3 and 6 month old male and female Grem1 null mice and wild type littermate controls. Sections were stained with von Kossa without counter stain (final magnification 40×) at all ages or unstained and examined under fluorescence microscopy at 1, 3 and 6 months of age (final magnification 100×).
