... 3.历史性对照（historical control） 4.交叉设计（cross over design） 5.序贯试验（sequential trial） ...
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cross-over design control 交叉设计对照
cross-over design trial 交叉设计试验
multiple cross-over design 多交叉设计
cross-over design 十字花纹
twin cross-over design 双交叉设计
Two stage cross-over design 二阶段交叉设计
The most common designs in clinical trial are parallel design and cross over design.
临床试验中最常见的设计是平行组设计和交叉设计。
METHODS 18 healthy male volunteers were given triprolidine hydrochloride capsules and tablets in a randomized cross over design.
方法18名健康志愿受试者，随机分组，自身交叉口服盐酸曲普利啶胶囊和片剂。
Then when you're finished reading this tutorial, you can cross over to our sister site NETTUTS and follow along as we build the design into clean and simple HTML.
当你看完本教程，你再去看看我们的姐妹站点NETTUTS，然后跟着做，这样我们就用简洁的HTML代码实现设计。
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