1. Department of Surgery, Chonbuk National University Medical School, Jeonju, Korea.
2. Department of Anatomy, Chonbuk National University Medical School, Jeonju, Korea.
3. Department of Anatomy and Embryology II, Faculty of Medicine, Complutense University, Madrid, Spain.
4. Oral Health Science Center hrc-8 and Department of Anatomy, Tokyo Dental College, Chiba, Japan.
5. Division of Internal Medicine, Iwamizawa Kojin-kai Hospital, Iwamizawa, Japan.
6. Research Institute of Clinical Medicine, Chonbuk National University Hospital, Jeonju, Korea.