1. Department of Animal Science, University of Manitoba, Winnipeg, MB, Canada R3T 2N2
2. Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 305-764, South Korea
3. Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan 410125, China
4. Department of Exercise and Nutrition Sciences, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY 14214