1. Department of Neurosurgery, Yanbian University Affiliated Hospital, Yanji, Jilin, China
2. Department of Neurosurgery, Chonnam National University Medical School, Hwasun-gun, Republic of Korea
3. Department of Dental Materials, School of Dentistry, Chosun University, Gwangju, Republic of Korea
4. Department of Biochemistry and Molecular Biology, Jeonbuk National University Medical School, Jeonju-si, Republic of Korea