UCA1 and gastric cancer: The expression levels of INHBA-AS1, MIR4435-2HG, CEBPA-AS1, and AK00108 were associated with tumor grade (Supplementary Figure 2A–2D); AK001058 had a higher expression level in GC tissues with lymph node metastasis compared to that with no lymph node metastasis (Supplementary Figure 2E), and the expression level of UCA1 was higher in GC I stage than that in GC II-IV stage (Supplementary Figure 2F).