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Biodefense and Bioterrorism free resource MedlinePlus Health Information https://medlineplus.gov/biodefenseandbioterrorism.html
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/14968660/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/14968660
subscription/membership/fee required Wiley https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=1073-1105&date=2003&volume=31&issue=4&spage=580