a) Growth rate of regenerating axons, b) success rate of axonal regeneration, and c) effective growth rate of axons as functions of CRMs-3 point-source densityfor different densities (η2) of the CRMs-2 point source. The test scaffold is sized as ra×rb = 0.15×0.3, the CRMs-1 point-source density is η1 = 1, and the number of severed axons is NA = 1200. d) Success rate of axonal regeneration averaged over η3 = 0−100 for each η2.</p