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.
Zins GR, Emmert DE, Walk RA.Zins GR, et al. Among authors: walk ra.J Pharmacol Exp Ther. 1968 Jan;159(1):194-205.J Pharmacol Exp Ther. 1968.PMID: 5689401No abstract available.
Roethig HJ, Munjal S, Feng S, Liang Q, Sarkar M, Walk RA, Mendes PE.Roethig HJ, et al. Among authors: walk ra.Nicotine Tob Res. 2009 Oct;11(10):1216-25. doi: 10.1093/ntr/ntp126. Epub 2009 Aug 21.Nicotine Tob Res. 2009.PMID: 19700523
Sarkar M, Stabbert R, Kinser RD, Oey J, Rustemeier K, von Holt K, Schepers G, Walk RA, Roethig HJ.Sarkar M, et al. Among authors: walk ra.Toxicol Appl Pharmacol. 2006 Jun 15;213(3):198-206. doi: 10.1016/j.taap.2005.11.003. Epub 2006 Jan 6.Toxicol Appl Pharmacol. 2006.PMID: 16405939
Roethig HJ, Kinser RD, Lau RW, Walk RA, Wang N.Roethig HJ, et al. Among authors: walk ra.J Clin Pharmacol. 2005 Feb;45(2):133-45. doi: 10.1177/0091270004271253.J Clin Pharmacol. 2005.PMID: 15647405Clinical Trial.