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- BioMed Central
- Publication date
- 01/01/2009
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- 31/08/2009
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- 01/01/2003
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- 01/12/2010
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- 'BMJ'
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- 01/01/2013
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- 'Elsevier BV'
- Publication date
- 01/01/2009
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- 'Elsevier BV'
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- 01/01/2008
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- 01/11/2011
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- 01/01/2006
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