他的关注焦点主要是数据组的选择问题，以及研究必须分析其结果对不同选择数据组的敏感性。
His concerns centred mostly on questions about the selection of data sets and the need for studies that showed how sensitive the results were to different selections of data.
对模型的主要参数进行了敏感性分析。
对所有研究进行异质性检验和敏感性分析。
Heterogeneity across studies was determined, and sensitivity analyses were conducted.
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