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.
Petzer IM, Donkin EF, Du Preez E, Karzis J, Van Der Schans TJ, Watermeyer JC, Van Reenen R.Petzer IM, et al. Among authors: karzis j.Onderstepoort J Vet Res. 2008 Sep;75(3):255-60. doi: 10.4102/ojvr.v75i3.101.Onderstepoort J Vet Res. 2008.PMID: 19040140
Petzer IM, Donkin EF, Du Preez E, Karzis J, van der Schans TJ, Watermeyer JC, van Reenen R.Petzer IM, et al. Among authors: karzis j.Onderstepoort J Vet Res. 2008 Dec;75(4):279-87. doi: 10.4102/ojvr.v75i4.104.Onderstepoort J Vet Res. 2008.PMID: 19294984
Petzer IM, Karzis J, Watermeyer JC, van der Schans TJ, van Reenen R.Petzer IM, et al. Among authors: karzis j.J S Afr Vet Assoc. 2009 Mar;80(1):17-22. doi: 10.4102/jsava.v80i1.163.J S Afr Vet Assoc. 2009.PMID: 19653514
Petzer IM, Karzis J, Van der Schans TJ, Watermeyer JC, Mitchell-Innes N, Eloff S, Fosgate GT.Petzer IM, et al. Among authors: karzis j.Onderstepoort J Vet Res. 2012 Feb 10;79(1):E1-6. doi: 10.4102/ojvr.v79i1.343.Onderstepoort J Vet Res. 2012.PMID: 23327304