Correlation between donor engraftment and bone radiographic measurements. Relationship between percentage of donor engraftment and cranium and long bones measurements. For MPS I nBMT mice (n = 13), the percentage of donor engraftment (x-axis, % human CD45.1⁺ cells) was plotted against the ratio of bone measurements with respect to that in WT mice. For all graphics, the linear regression line, the ρ value, and the statistical likelihood that there is a correlation between the 2 variables are shown. Green lines indicated WT values, and red lines MPS I untreated values.