1. Department of Veterinary Medicine, College of Veterinary Medicine, National Chung Hsing University, No. 145, Xingda Rd., South Dist., Taichung 40227, Taiwan
2. Department of Fishery Biology, Faculty of Fisheries, Kasetsart University, 50 Paholyotin Rd., Ladyao, Chatujak, Bangkok 10900, Thailand
3. Biology Division, Veterinary Research Institute, Ministry of Agriculture, Executive Yuan, No. 376, Zhongzheng Rd., Danshui Dist., New Taipei City 25158, Taiwan