Gatam, A.R., Orthopaedic Spine Division, Fatmawati General Hospital, Jakarta, Indonesia; Gatam, L., Orthopaedic Spine Division, Fatmawati General Hospital, Jakarta, Indonesia; Mahadhipta, H., Orthopaedic Spine Division, Tangerang General Hospital, Banten, Indonesia; Ajiantoro, A., Orthopaedic Spine Division, Premier Bintaro Hospital, Banten, Indonesia; Luthfi, O., Orthopedic Spine Division, Adhyaksa General Hospital, Jakarta, Indonesia; Aprilya, D., Orthopedic and Traumatology Department, Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia