(B) The distance between trabeculae was reflected in a shift to the right of the distribution curves for 12-month-old Sam68+/+. Solid black = 4-month-old Sam68+/+; hatched black = 12-month-old Sam68+/+; solid red = 4-month-old Sam68−/−; stippled red = 12-month-old Sam68−/−. The asterisks denote p < 0.01.