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Scattering spectra of the eight tested bacteria species. The three dark-field aperture setting are denoted by colors corresponding to Fig. 1(b) (ring 1 = blue, ring 2 = green, ring 3 = red). Error bars show the standard error of the mean for sample sizes ranging from N = 346 for S. pneumoniae to N = 2172 for P. aeruginosa.
