1. Department of Anesthesiology and Pain Medicine, Wonkwang University Hospital, Wonkwang University School of Medicine, Iksan, Korea
2. Department of Anatomy, Wonkwang University School of Medicine, Iksan, Korea
3. Jesaeng-Euise Clinical Anatomy Center, Wonkwang University School of Medicine, Iksan, Korea
4. Department of Nursing, Kunsan National University, Gunsan, Korea