1. School of Agriculture and Biology, Shanghai Key Lab of Veterinary Biology, Shanghai Jiaotong University, Shanghai, People's Republic of China.
2. School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, People's Republic of China.
3. Department of Internal Medicine, College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling, People's Republic of China.
4. ABBIOSCI, Inc., Seattle, Washington.