产品改进文档是文献列表，这些文献能够帮助主要调查者理解LSDA计划的目标，提交报告和数据。
PI Documents: a list of documents that will help principal investigators understand the goals of the LSDA project and help with the submittal of reports and data.
另一项研究是2011年4月在网上发布的，主要调查荷兰40及40岁以上男性所生孩子的心理健康状况。
Another study, published online in April 2011, looked at mental health outcomes in the children of fathers aged 40 and above in the Netherlands.
该调查的主要发现之一是对已安装到位的设备的混淆。
One of the main findings of the survey was the confusion about the facilities already in place.
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