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.
Hess C, Krueger L, Unger M, Madea B.Hess C, et al.Drug Test Anal. 2017 Oct;9(10):1506-1511. doi: 10.1002/dta.2133. Epub 2016 Dec 28.Drug Test Anal. 2017.PMID: 27863089
Kraemer M, Madea B, Hess C.Kraemer M, et al. Among authors: hess c.Drug Test Anal. 2019 Oct;11(10):1498-1506. doi: 10.1002/dta.2682. Epub 2019 Sep 1.Drug Test Anal. 2019.PMID: 31407526
Krämer M, Schäper M, Dücker K, Philipsen A, Losacker M, Dreimüller N, Engelmann J, Madea B, Hess C.Krämer M, et al. Among authors: hess c.Drug Test Anal. 2021 Sep;13(9):1614-1626. doi: 10.1002/dta.3110. Epub 2021 Jun 21.Drug Test Anal. 2021.PMID: 34114750