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.
Johnson DA, Levy BH 3rd.Johnson DA, et al.Expert Opin Pharmacother. 2010 Jun;11(9):1541-8. doi: 10.1517/14656566.2010.482932.Expert Opin Pharmacother. 2010.PMID: 20450445Review.
Parekh PJ, Merrell J, Clary M, Brush JE, Johnson DA.Parekh PJ, et al. Among authors: johnson da.Am J Gastroenterol. 2014 Jan;109(1):9-19. doi: 10.1038/ajg.2013.228.Am J Gastroenterol. 2014.PMID: 24402526Review.
Oldfield EC IV, Oldfield EC III, Johnson DA.Oldfield EC IV, et al. Among authors: johnson da.World J Gastrointest Pharmacol Ther. 2014 Feb 6;5(1):1-26. doi: 10.4292/wjgpt.v5.i1.1.World J Gastrointest Pharmacol Ther. 2014.PMID: 24729930Free PMC article.Review.
Parekh PJ, Oldfield Iv EC, Challapallisri V, Ware JC, Johnson DA.Parekh PJ, et al. Among authors: johnson da.Am J Gastroenterol. 2015 Apr;110(4):484-8. doi: 10.1038/ajg.2014.247. Epub 2014 Aug 26.Am J Gastroenterol. 2015.PMID: 25155226