[1
]
Spine Center and Department of Orthopaedic Surgery, Seoul National University College
of Medicine and Seoul National University Bundang Hospital, 166 Gumi-ro, Bundang-gu,
Seongnam, 463-707, Republic of Korea.
[2
]
Department of Mechanical Engineering, Yonsei University, 134 Sinchon-dong, Seodaemun-gu,
Seoul, 03722, Republic of Korea.
[3
]
Department of Orthopaedic Surgery, Seoul National University College of Medicine and
Seoul National University Hospital, 101 Daehangno, Jongno-gu, Seoul, 110-744, Republic
of Korea.
[4
]
Spine Center and Department of Orthopaedic Surgery, Seoul National University College
of Medicine and Seoul National University Bundang Hospital, 166 Gumi-ro, Bundang-gu,
Seongnam, 463-707, Republic of Korea. Electronic address: highcervical@gmail.com.
[5
]
Columbia University Department of Orthopedic Surgery, Division of Spinal Surgery,
Spine Hospital at New York-Presbyterian/The Allen Hospital, 5141 Broadway, 3 Field
West, New York, NY 10034, USA.