SRPK1 and cancer: We also included four additional splicing regulatory genes (HNRNPA2B1, HNRNPH1, HNRNPCL1, and SRPK1) because they are either related to cancer in general or have been associated with telomere biology (HNRNPA2B1: [36]; HNRNPH1: [37]; HNRNPCL1: [38]; SRPK1: [39]).