1. Hyohoon Jeong:
Department of Equine Resources Science, School of Equine Science, Cheju Halla University,38 Halladaehak-ro, Jeju 63092,Republic of Korea
2. Young Sam Kwon:
Department of Veterinary Surgery, College of Veterinary Medicine, Kyungpook National University,80 Daehakro, Daegu 41566,Republic of Korea