In order to reuse EHRs for research (Secondary Use), researchers may have to apply for the permission of using EHR data for their research. This process is e.g. necessary in a German research project, called Greifswald Approach to Individualized Medicine (GANIMED). There, it is unknown to a researcher at the time of a query, how many patients are available that fit the necessary inclusion and exclusion criteria for a certain study. Between a researcher and the research platform exists an informational gap, not allowing a preview of the available data. Also, results come with a significant delay.
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