METHODS: Randomized double blind control clinical trial was used.

方法：随机双盲双模拟对照研究。

youdao

Methods A random, double blind, and placebo control study was conducted.

方法采用随机双盲、安慰剂平行对照研究。

youdao

Methods: Prospective, double-blind control study.

方法：前瞻性、双盲对照研究。

youdao

In the double-blind, randomized control trial, half the women got tenofovir gel and half got a placebo.

CNN: Gel cuts HIV transmission rate in study