1. Department of Internal Medicine, College of Medicine, Wonkwang University, Iksan, Korea.
2. Department of Plastic Surgery, College of Medicine, Wonkwang University, Iksan, Korea.
3. Department of Neurosurgery, College of Medicine, Wonkwang University, Iksan, Korea.
4. Department of Emergency Medicine, Wonkwang University Sanbon Hospital, Gunpo, Korea.