Centrality dependence of normalized slopes $r^{\rm Norm}_2$ (left panel) and $r^{\rm Norm}_3$ (right panel) for inclusive and identified charged hadrons in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV. Statistical (systematic) uncertainties are depicted by bars (boxes). The data points for charged pions and kaons are slightly shifted horizontally for visibility.