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Fits using a sum of exponentials with rates from Table 1 of two voxels selected from the 5 s/3 s data set. The red (solid) line is the input data and the green (dashed) line represents the fit, (a) voxel sensitive to the second intermediate only, (b) voxel sensitive to the first and third intermediates. The contributions of each exponential term to the total fit are shown with purple, light blue, and dark blue dotted lines.
