• Full text available at: Gale In Context: Opposing Viewpoints
• Available from 02/26/2008.
  
• Full text available at: Springer Nature OA Free Journals
• Available from 12/01/2008 volume: 1 issue: 1.
  
• Full text available at: BioMed Central Journals Complete
• Available from 2008.
  
• Full text available at: BioMed Central Open Access Free
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• Full text available at: DOAJ Directory of Open Access Journals
• Available from 2008.
  
• Full text available at: EBSCOhost Academic Search Complete
• Available from 01/01/2009.
  
• Full text available at: PubMed Central
• Available from 2008 volume: 1.
  
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