Influence of study type, country, weather effect estimate adjusted or not and PPI ascertainment method on the pooled effect estimate and its associated heterogeneity.

Influence of study type, country, weather effect estimate adjusted or not and PPI ascertainment method on the pooled effect estimate and its associated heterogeneity.研究类型、研究所在国家、效应估计是否针对气象影响进行校正，以及PPI确定方法对合并效应估计及其相关异质性的影响。