efilter
As new Insider's Guide classes are no longer being offered, this site is not currently being updated. Please refer to NCBI's E-utilities documentation for more up-to-date information.
The efilter command uses the History server to filter or restrict the results of a previous query.
This page is still under construction. For more information on efilter, please see NCBI’s EDirect documentation page, “Entrez Direct: E-utilities on the UNIX Command Line”.