FLVCR2 and glioblastoma: This classification rule was also of prognostic value on a set of lung carcinoma samples (Figure 4C and Additional file 3E and 3F), although there were too few 'low' samples to be included into the Kaplan-Meier plot analysis, and on a set of patients with glioblastoma (Figure 4D and Additional file 3G and 3H); we noted that two genes (ANGPTL4 and C14ORF58) were not found on the Affymetrix platform for lung and glioblastoma test data sets.