DESIGN: a randomized control study.
设计:随机对照研究。
DESIGN: a randomized control observation.
设计:随机对照观察。
Study Design. A prospective randomized control trial.
研究设计:一个前瞻性随机试验。
Design: a completely randomized grouping design and randomized control trial.
设计:随机分组设计、对照实验。
Design: a complete randomized design with control trial.
设计:完全随机设计,对照实验研究。
DESIGN: a completely randomized experiment with self-control and mutual control.
设计:完全随机设计,自身及组间对照。
DESIGN: a completely randomized control study.
设计:完全随机设计,对照实验研究。
DESIGN: a completely randomized case-control study.
设计:完全随机对照研究。
DESIGN: a completely randomized case-control study.
设计:完全随机对照研究。
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