What happens to Science Express articles when the print version is published?
When the print version appears, the Science Express version is replaced with an electronic file of the print version, and the paper is moved to the appropriate print issue on the Science site. The paper will no longer appear in the Science Express index; however, all links and bookmarks will still access the final printed version (the URL will not change). Access to the earlier Science Express version of the paper is available through a link from the full text of the online version of the final print paper; the digital object identifier (DOI) of the paper, which allows rapid electronic access to all versions, also appears in print.