所有取样培养液样本，包括不含有胚胎的对照组，均被编号，冷冻，随后双盲分析。
Spent media samples, including controls containing no embryo, were coded, frozen and subsequently analysed blind.
本实验采用完全随机设计，为增加对照组数据的精确性，而增加了对照组的样本数量。
Trabant design was applied in this experiment. The number of samples of control groups was added so as to raise the truth of data.
同时收集26名正常儿童样本为对照组，进行相同血清细胞因子检测。
The samples of 26 normal children were also collected as control group for the same serum cytokines detection.
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