1. Department of Conservative Dentistry, School of Dentistry, Pusan National University, Dental Research Institute, Yangsan, Korea.
2. Area of Endodontics, Faculty of Dentistry, the University of Hong Kong, Hong Kong SAR, China.
3. Department of Conservative Dentistry, School of Dentistry, Kyungpook National University, Daegu, Korea.
4. Climate Research Department, APEC Climate Center, Busan, Korea.