Crossmark provides a cross-platform way for readers with the current, authoritative version of our articles. PharmakonPress Publications have partnered with CrossRef to use their Crossmark service. The Crossmark button informs readers if an update has occurred since the publication of an article and may also give you additional publication record information about the document. It gives our readers the ability to look up a publication’s latest status in real time. If the publisher makes any significant changes to an article (eg, addendum, erratum, retraction, etc), Crossmark will alert the reader. Minor updates (eg, spelling corrections) will not trigger a Crossmark status update. Crucially, the Crossmark button can also be embedded in PDFs, which means that members have a way of alerting readers to changes months or even years after it’s been downloaded.