An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Ying GG, Kookana RS.Ying GG, et al.J Environ Sci Health B. 2001 Sep;36(5):545-58. doi: 10.1081/PFC-100106184.J Environ Sci Health B. 2001.PMID: 11599719
Ying GG, Kookana RS, Chen Z.Ying GG, et al.J Environ Sci Health B. 2002 May;37(3):225-34. doi: 10.1081/PFC-120003100.J Environ Sci Health B. 2002.PMID: 12009193