MEIS2 and retinitis pigmentosa 1: Next, to test the possible prognostic potential of MEIS2 at the transcriptional level, we used data from three publicly available PC patient cohorts: RNAseq data from Long et al. (n = 106 RP patients) [28], microarray expression data from Taylor et al. (n = 126 RP patients) [35], and RNAseq data from TCGA (n = 495 RP patients) [29].