Fig. 1From: Characterization and selection of Japanese electronic health record databases used as data sources for non-interventional observational studiesOverview of the construction of a large-scale, integrated, electronic health record (EHR) database. White parallelograms represent the data included in EHRs. Cylinders represent EHR databases. The dark parallelogram represents the dataset provided to researchers who conduct non-interventional observational studiesBack to article page