Document Type: Research Article
Affiliations: 1: Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS 39762, USA. 2: School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan. 3: Department of Biological Sciences, Purdue University Calumet, Hammond, IN 46323-2094, USA. 4: Department of Mathematics and Statistics, South Dakota State University, Brookings, SD 57007, USA.
Publication date: May 4, 2011