1. Department of Orthopedic Surgery, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang, Korea.
2. Department of Thoracic and Cardiovascular Surgery, SMG-SNU Boramae Medical Center, Seoul, Korea.
3. Department of Radiology, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang, Korea.
4. Department of Neurosurgery, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang, Korea.