title: Transitions.
authors: H David
authors: HD
authors: Crombie
mesh_terms: D006801:Humans; D033181:Information Dissemination; D020407:Internet / Q000639:trends*; D008511:Medicine / Q000639:trends*; D010506:Periodicals as Topic / Q000639:trends*; D011643:Publishing / Q000639:trends*; D014481:United States