Journal of Central Nervous System Disease

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Journal metrics are simple aggregations of metrics for articles published in this journal.  Metrics are calculated from a variety of sources.  These sources and their known limitations are summarised here.

Total journal views and downloads by month are derived from internal data and usually also Pubmed Central data.  Internal data is recorded in accordance with Project COUNTER Release 3, which is used by many publishers to ensure that visibility data is credible and reliable for readers.  It excludes automated search engine and archiving visits or downloads and rapid sequences of views or downloads to prevent accidental or intentional manipulation of data.  

Prior to September 2008 COUNTER data was not collected and prior to January 2011 views and downloads were not recorded separately.  Views by region are also derived from COUNTER data and because data on geographical region is not always available discrepancies may exist between quantities shown on the map and the table.

Pubmed Central data is only shown where the journal is present on PMC and articles' PMC identifying numbers are recorded in our database.  Owing to PMC limitations data is updated once monthly and is not available prior to September 2010.