NAMPT and breast cancer: Despite the relatively high levels of TRF2 and NAMPT measured in all the evaluated cancer histotypes (Figure S8a,b), the Pearson's correlation analysis revealed that the two mRNAs positively correlate in breast cancer (BC; Figure S8c), suggesting that this kind of tumor would represent, for its molecular characteristics, the best candidate for testing the antitumoral properties of NAMPT inhibitors as telomere‐targeting agents.