Comparison between iNMF subtypes and subtypes identified by Loboda et al. and Oh et al.Shown are samples contained in GSE2109, GSE14333, GSE17536, and GSE17537. The x- and y-axes depict the difference between average expression of signatures published by Oh et al. and Loboda et al. Lines along the axes represent the density of samples of the respective iNMF subtypes.