Electronic database searches and citation searches; researchers in the field were contacted.
搜寻电子资料库及其相关论文引用之文献﹐并联系此一领域的研究人员。
Hand searches also were conducted of the reference lists of primary studies, review articles, and clinical guidelines along with full-text review of any citation that appeared relevant.
并手动检索其主要研究结果、综述、临床指南，以及与之相关的引文中所出现的参考文献。
Hand searches also were conducted of the reference lists of primary studies, review articles, and clinical guidelines along with full-text review of any citation that appeared relevant.
并手动检索其主要研究结果、综述、临床指南，以及与之相关的引文中所出现的参考文献。
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