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Examples of radiographs obtained in (a) a 14.13-year-old Asian boy, (b) a 14.46-year-old African American boy, (c) a 14.79-year-old white boy, and (d) a 14.64-year-old Hispanic boy. Corresponding demographic data and bone age, as assigned by two radiologists, are included in the DICOM image header (Table 1).
