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.
Collatos C, Reef VB, Richardson DW.Collatos C, et al. Among authors: richardson dw.J Am Vet Med Assoc. 1989 Nov 1;195(9):1252-4.J Am Vet Med Assoc. 1989.PMID: 2684942
Reef VB, Roby KA, Richardson DW, Vaala WE, Johnston JK.Reef VB, et al. Among authors: richardson dw.J Am Vet Med Assoc. 1987 Feb 1;190(3):286-8.J Am Vet Med Assoc. 1987.PMID: 3549650
MacDonald MH, Richardson DW, Morse CC.MacDonald MH, et al. Among authors: richardson dw.J Am Vet Med Assoc. 1987 Dec 1;191(11):1455-6.J Am Vet Med Assoc. 1987.PMID: 3692995
Gasiorowski JC, Richardson DW.Gasiorowski JC, et al. Among authors: richardson dw.Vet Clin North Am Equine Pract. 2014 Apr;30(1):211-20. doi: 10.1016/j.cveq.2013.11.011. Epub 2014 Feb 5.Vet Clin North Am Equine Pract. 2014.PMID: 24680213