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.
Wong IS, Ostry AS, Demers PA, Davies HW.Wong IS, et al. Among authors: davies hw.J Occup Environ Hyg. 2012;9(8):467-77. doi: 10.1080/15459624.2012.693831.J Occup Environ Hyg. 2012.PMID: 22708722
Dennekamp M, Demers P, Bartlett K, Davies H, Teschke K.Dennekamp M, et al.Ann Agric Environ Med. 1999;6(2):141-6.Ann Agric Environ Med. 1999.PMID: 10607995Free article.