POU5F1 and cancer: For the 11 protein‐coding genes (CDKN2A, CBL, GRB7, HDAC4, HRAS, MYC, POU5F1B, PIK3CD, RB1, RPS6KA1 and ZBTB48) shared by at least five cancer types, except POU5F1B (also known as OCT4‐pg1), all 10 of the other drivers have been recorded as cancer genes in the databases of census, DriverDB, Bushman or TSGene.