Methods: To adopt a random, double-blind and placebo comparative research.
方法：采用前瞻性随机双盲、安慰剂对照研究。
Methods The clinical studies with double blind and comparative method.
方法采取随机双盲对照临床研究。
Comparative digestibility of goats' vs. cows' milk fats in children with digestive malnutrition: a double-blind study.
比较消化率山羊与消化与营养不良：双盲研究儿童牛奶脂肪。
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