text_1: 所有 分析 均 采用 SAS 软件 9.4 版 ( SAS Institute ) 和 R 软件 3.6 . 0 版 ( R Project for Statistical Computing ) 完成 .
  
text_2: all analyses were performed with SAS , version 9.4 ( SAS Institute ) , and R , version 3.6.0 ( R Project for Statistical Computing ) .
  