1. Department of Medical & Biological Engineering, Graduate School, Kyungpook National University, Daegu, Republic of Korea.
2. Department of Dental Biomaterials, School of Dentistry, and Institute for Biomaterials Research & Development, Kyungpook National University, Daegu, Republic of Korea.
3. Department of Conservative Dentistry, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea.