新药临床试验中使用安慰剂是一个颇具争议的问题。
The utilization of placebo is controversial in the new drug clinical trials.
本文介绍新药临床试验的中间分析和成组序贯试验。
This paper introduces the interim analysis and group sequential trials in clinical experimentations.
目的：介绍新药临床试验中桥接试验的概念和实施策略。
AIM: To introduce the concept of bridging study and its strategies in clinical trials for new drug application.
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