Differential clump mass function of ATLASGAL sources with distances from 2 to 5 kpc fitted to masses above 1000 M_⊙ in the upper panel yields a power-law exponent of −2.19 ± 0.11. The vertical line displays the completeness limit of 1000 M_⊙. A lognormal function is fitted to the mass distribution of this ATLASGAL subsample resulting in A = 188, M_peak = 700 M_⊙, and σ = 0.49. M_peak is below the completeness limit and the peak itself is thus not well constrained.