NTRK2 and lung cancer: Supplementary Figure 2 demonstrates the similarity between lung cancer and head/neck SCC in NTRK2. Supplementary Figures 3-5 depict the relationship of every probe tested in the PROSPECT database of NTRK2, CHEK2, and NCOA3, respectively. We could not find substantial differences between the two probes utilized for NCOA3 (Supplementary Figure 6), but for CHEK2, the probe that was correlated with SCC histology was the more reliable of the two, thereby strengthening the relationship between increased expression of this protein and SCC histology (Supplementary Figure 7).