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Full text available at:
BMJ Journals
Available from 2002 volume: 11 issue: 1 until 2010 volume: 14 issue: 6.
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BMJ Journals Online Archive Free
Available from 1992 volume: 1 issue: 1 until 2005.
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PubMed Central
Available from 2002 volume: 11 until 2007 volume: 16 issue: 6.