The classic model is, you get a bunch of studies where you know that they've been conducted and completed, in the academic literature. So this took all of the trials that had ever been conducted on antidepressants that were approved over a 15-year period by the FDA.
经典的例子就是，你有了一堆 已经临床使用过并有结论的试验 而你要找学术文献机构 询问是否曾经有发表。他们寻找了所有抗抑郁药物有关的 被食品药物管理局15年前审批的