Heat-map of gene expression in the 286 SCLC tumors analyzed, arrayed horizontally and sorted by relative expression of ASCL1, NEUROD1, POU2F3, and YAP1, defining subtype assignments to categories SCLC-A, -N, -P, and -Y. Additional genes shown include INSM1, upregulated in the neuroendocrine-high subtypes SCLC-A and -N, and MYC, most highly expressed in SCLC-P.