The geNorm algorithm identified the two genes CASC3 and RPS2 as the most robust reference genes across the tested melanoma cell lines (n = 13) (average stability value M = 0.380) (output in Fig. 5d; also see data in Table of Supplemental Digital Content 6, http://links.lww.com/MR/A187). Here, CASC3 is linked to melanoma.