ZFAS1 and cancer: Therefore, in order to make the results more accurate and perfect, different methods were used to examine the relative expression level of lncRNA ZFAS1 in cancer samples including lncRNA microarray analysis, northern blot analysis, situ hybridization, and RNA-Seq.[33–35] Fourth, some studies did not provide HRs, which require the calculation or extraction HRs and 95%CIs from the available data or Kaplan–Meier curves.