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.
Boettcher J, Filter B, Denecke J, Hot A, Daubmann A, Zapf A, Wegscheider K, Zeidler J, von der Schulenburg JG, Bullinger M, Rassenhofer M, Schulte-Markwort M, Wiegand-Grefe S.Boettcher J, et al.BMC Fam Pract. 2020 Nov 20;21(1):239. doi: 10.1186/s12875-020-01312-9.BMC Fam Pract. 2020.PMID: 33218310Free PMC article.
Boettcher J, Denecke J, Barkmann C, Wiegand-Grefe S.Boettcher J, et al.Int J Environ Res Public Health. 2020 Dec 2;17(23):8975. doi: 10.3390/ijerph17238975.Int J Environ Res Public Health. 2020.PMID: 33276595Free PMC article.
Boettcher J, Boettcher M, Wiegand-Grefe S, Zapf H.Boettcher J, et al.Int J Environ Res Public Health. 2021 May 8;18(9):4993. doi: 10.3390/ijerph18094993.Int J Environ Res Public Health. 2021.PMID: 34066738Free PMC article.Review.
Sell M, Daubmann A, Zapf H, Adema B, Busmann M, Stiawa M, Winter SM, Lambert M, Wegscheider K, Wiegand-Grefe S.Sell M, et al.Int J Environ Res Public Health. 2021 Jul 28;18(15):7985. doi: 10.3390/ijerph18157985.Int J Environ Res Public Health. 2021.PMID: 34360277Free PMC article.