Method: This clinical research adopts randomized blocks, double-blind and placebo control.

方法：采用区组随机、双盲、安慰剂平行对照临床试验。

youdao

Method: This clinical research adopts randomized blocks, double-blind and placebo control.

方法：采用区组随机、双盲、安慰剂平行对照临床试验。

youdao