目的探讨G蛋白β3亚单位(G－protein β polypeptide－3，GNβ3)基因与抑郁症的关系；并以负性生活事件和童年期创伤性事件作为环境因素，进......

目的 探讨地区环境因素和血钙、铁、锌对儿童血铅水平的影响和干预效果.方法 ①对青岛地区3160名儿童家长进行问卷调查,包括一般项......

A greenhouse experiment was conducted to determine the influence of the environmental factors such as Iow-temperature, d......