For the selection of small RNAs that could be used as normalizers in qPCR analysis of miR expression for cancer stem-like cell subpopulations, we analyzed two cell subpopulations with stemness properties: i) ALDH+ sorted cells by FACS and ii) low adherent cells isolated by differential trypsinization, as we have previously described in Morata-Tarifa et al. 201616. The gene discussed is LDHA; the disease is cancer.