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.
Barr DB, Barr JR, Driskell WJ, Hill RH Jr, Ashley DL, Needham LL, Head SL, Sampson EJ.Barr DB, et al. Among authors: head sl.Toxicol Ind Health. 1999 Jan-Mar;15(1-2):168-79. doi: 10.1191/074823399678846556.Toxicol Ind Health. 1999.PMID: 10188199
Hill RH Jr, Ashley DL, Head SL, Needham LL, Pirkle JL.Hill RH Jr, et al. Among authors: head sl.Arch Environ Health. 1995 Jul-Aug;50(4):277-80. doi: 10.1080/00039896.1995.9935954.Arch Environ Health. 1995.PMID: 7677426
Hill RH Jr, Shealy DB, Head SL, Williams CC, Bailey SL, Gregg M, Baker SE, Needham LL.Hill RH Jr, et al. Among authors: head sl.J Anal Toxicol. 1995 Sep;19(5):323-9. doi: 10.1093/jat/19.5.323.J Anal Toxicol. 1995.PMID: 7500620
Hill RH Jr, Schurz HH, Posada de la Paz M, Abaitua Borda I, Philen RM, Kilbourne EM, Head SL, Bailey SL, Driskell WJ, Barr JR, et al.Hill RH Jr, et al. Among authors: head sl.Arch Environ Contam Toxicol. 1995 Feb;28(2):259-64. doi: 10.1007/BF00217625.Arch Environ Contam Toxicol. 1995.PMID: 7710294
Hill RH Jr, Head SL, Baker S, Gregg M, Shealy DB, Bailey SL, Williams CC, Sampson EJ, Needham LL.Hill RH Jr, et al. Among authors: head sl.Environ Res. 1995 Nov;71(2):99-108. doi: 10.1006/enrs.1995.1071.Environ Res. 1995.PMID: 8977618