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. 2009 May;251(2):525–534. doi: 10.1148/radiol.2512071180

Figure 2a:

Figure 2a:

Graphs depict lines that show the associations of mean blood flow velocities (V) and VMCA/VICA ratio with age in (a) children with SCD and (b) healthy children. Association of Doppler parameters with age in healthy children was estimated on the basis of two published studies (24,25).