1. Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina.
2. Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Korea.
3. Department of Mechanical Engineering, Center for Rapid Prototyping Based 3D Tissue/Organ Printing, Pohang University of Science and Technology (POSTECH), Pohang, Korea.
4. Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea.