In PubMed, the Limits page has been replaced by a results filter sidebar in order to provide users with a more visible and accessible way to narrow PubMed results. The new filter sidebar appears on the left-hand side of all searches and provides the ability to limit your results to age, date of publication, publication type and more. The filter sidebar options will work the same way as the limit selections; that is, once a filter is selected it will be activated for subsequent searches until the selection is cleared.