HIF1A and nonpapillary renal cell carcinoma: Our experimental data (Figure 1a and Supplementary Figure 2) and our literature analysis above have established the mutually exclusive relationship of BAF180 and HIF1α protein expression in the majority (19/21=90%) of ccRCC cell lines, our own data (Figure 1b) and analysis of the published data sets (see below) also support such relationship in a subset of the primary ccRCC tumors.