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Current < 5 years or has been reaffirmed for continued use until further notice
Current > 5 years: is being reviewed to determine if it requires updating - use this version with discretion, as it is possible that some information may be out-of-date
> 5 years: has recently been reviewed and an updated version will be soon be published - use this version with discretion as some information has been deemed to be outdated
 x deemed to have dated information, and therefore should not be consulted for clinical use but rather for historical research only