So, the problem is that the clinical trial was done, and we were a part of it, and in the fundamental clinical trial -- the pivotal clinical trial we call the Phase Three, we refused to use a placebo.
临床试验已经做了， 我们参与了其中一部分， 在基本的临床试验中， 关键的一个试验我们叫它第三阶段， 我们拒绝使用安慰剂。