“WHAT is history,” said Napoleon, “but a fiction agreed upon.” … “The only point on which librarians are united is that classification is a question disagreed upon.” So writes Mr. Campbell, and the ...

[1] Bibliographic reference: author(s), year, article title, journal, volume, pages. [2] Study type: for example, randomised controlled trial, cohort or case–control studies. [3] Number of patients: ...