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. 2015 Apr 20;6:6893. doi: 10.1038/ncomms7893

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(a) F₁(x) normalized by F₁(L/2) for multichannel samples (N=10) and for 1D samples (N=1) with values of L/ξ ranging from 0.25 to 11.7. The dashed black curves are plots of Y₁(x,x) normalized by Y₁(L/2,L/2) found from equation (2) with position-dependent diffusion coefficient D(x) shown in b. (b) Normalized position-dependent diffusion coefficient D(x)/D(0) found from the gradient of W(x) shown in the inset for the same samples as in a.