1. Laboratory of Stem Cells and Tissue Regeneration,
Department of Biotechnology, College of Life Sciences and Biotechnology,
Science Campus, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea
2. Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-gu, Pohang, Gyeongbuk 37673, Korea