Description of the change: References to online versions of the Cochrane Handbook of Systematic Reviews of Interventions updated to Version 6.5. Reference now includes date chapter last updated, as well as date whole Handbook was updated.
Description of the change: Heading 'Numbers with five or more digits' changed to 'Numbers with four or more digits' to fit examples.
Changed 'h' to 'hours' in correct example of ranges of numbers.