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Topological and mechanical property maps of chitosan hydrogels (Lateral surfaces). a, d, g, j and m Histograms of elastic modulus distributions for a given region (in blue), superimposed with the elastic modulus estimation of density probability functions performed with all studied samples (in red). b, e, h, k and n Topography (relative height) of the hydrogel surface. c, f, i, l and o Elastic modulus distribution map on the hydrogel surface
