1. Department of Stem Cell and Regenerative Biotechnology, Humanized Pig Research Center (SRC), Konkuk University, Seoul, Republic of Korea
2. Department of Animal Science, Pusan National University, Miryang, Gyeongnam, Republic of Korea
3. Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA, USA
4. Division of Animal Science, University of Missouri-Columbia, Columbia, MO, USA