1. Department of Animal Science and Biotechnology, College of Agriculture and Life Sciences, Chungnam National University, Daejeon 305-764, Korea
2. Department of Animal Science, Faculty of Agriculture, Sebelas Maret University, Surakarta 57126, Indonesia
3. Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute for Agriculture and Life Science, Seoul National University, Seoul 151-921, Korea