The original article presented the density scaling relation (Eq. (2)) incorrectly. The correct relation is: This error affects the rightmost panel of Fig. 10, the bottom left panel of Fig. 13, and the bottom left panel of Fig. 14. The corrected panels are presented in Figs. 1 and 2. The sentence "We note that the large number of outliers in mean density estimates in Fig. 10 arise mainly from their very small uncertainties". is no longer relevant, as the majority of these are no longer outliers with the correct relation.