However, the minimum and maximum (min-max) range for head and neck cancer cell line SCC6 was calculated to be 0.490 for HPRT1 and 2.990 for ACTB (Supplementary Fig. S1a) while for SCC-1483 (Supplementary Fig. S1b) it was 0.409 for B2M and 4.093 for ACTB respectively. This evidence concerns the gene B2M and head and neck cancer.