Giordan E., Spine Center, Department of Neurosurgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea, Department of Neurosurgery, AULSS2 Marca Trevigiana, Treviso, Italy; Lee C., Spine Center, Department of Neurosurgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea; Setiawan D.R., Spine Center, Department of Neurosurgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia; Pholprajug P., Spine Center, Department of Neurosurgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea, Department of Orthopedics, Rayong Hospital, Rayong, Thailand; Kim J.-S., Spine Center, Department of Neurosurgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea