Design non-randomized clinical trial.
设计非随机化临床试验。
DESIGN: Non-randomized concurrent control analysis.
设计：非随机化同期对照分析。
DESIGN: Non-randomized concurrent control experiment.
设计：非随机化同期对照实验。
DESIGN: a non randomized controlled study was conducted.
设计非随机对照研究。
DESIGN: a non randomized controlled study was conducted.
设计非随机对照研究。
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