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.
Boehmert C, Wiedemann P, Croft R.Boehmert C, et al.Int J Environ Res Public Health. 2016 Oct 9;13(10):992. doi: 10.3390/ijerph13100992.Int J Environ Res Public Health. 2016.PMID: 27735851Free PMC article.Clinical Trial.
Boehmert C, Witthöft M, Van den Bergh O.Boehmert C, et al.Environ Health. 2020 Nov 25;19(1):122. doi: 10.1186/s12940-020-00652-4.Environ Health. 2020.PMID: 33239049Free PMC article.