Transverse momentum spectra of \fzero in p--Pb collisions at \snn = 5.02 TeV for different multiplicity classes, which are scaled for visibility. Statistical and systematic uncertainties are shown as error bars and boxes, respectively. The normalization uncertainty of 13\% due to the uncertainty of the $\mathrm{B.R.}$ is not shown in the figure. The lower panel shows the ratios of the spectra in multiplicity classes to the NSD spectrum.