1. Department of Anatomy, Jeju National University School of Medicine, Jeju, Korea.
2. Department of Biomedicine & Drug Development, Jeju National University, Jeju, Korea.
3. Medical Course, Jeju National University School of Medicine, Jeju, Korea.
4. Department of Radiation Oncology, Jeju National University Hospital, Jeju National University School of Medicine, Jeju, Korea.