1. Master’s Course, Dept. of Livestock Environmental Science & Technology, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea
2. Rearch Professor, Institute of Agricultural Science, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea
3. Docter’s Course, Dept. of Dairy Science, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea
4. Professor, Division of Animal and Dairy Science,Chungnam Nationla University, 99, Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea