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.
Frank R, Braun HE.Frank R, et al. Among authors: braun he.Bull Environ Contam Toxicol. 1990 Jun;44(6):932-9. doi: 10.1007/BF01702186.Bull Environ Contam Toxicol. 1990.PMID: 2112968No abstract available.
Frank R, Braun HE.Frank R, et al. Among authors: braun he.Bull Environ Contam Toxicol. 1989 May;42(5):666-9. doi: 10.1007/BF01700385.Bull Environ Contam Toxicol. 1989.PMID: 2500993No abstract available.
Frank R, Braun HE, Ripley BD.Frank R, et al. Among authors: braun he.J Assoc Off Anal Chem. 1987 Nov-Dec;70(6):1081-6.J Assoc Off Anal Chem. 1987.PMID: 3436903