6United States Department of Health and Human Services, Centers for Disease Control and Prevention,National Institutes of Health. Biosafety in microbiological and biomedical laboratories[M]. 4th ed. Washington DC, 1999.
7Berg P. Asilomar conference on recombinant DNA molecules. Science, 1975(188):991-994.
8World HeaLth Organization, Laboratory biosafety manual[M]. 3rd ed . Geneva, 2004.