Rahyussalim A.J., Divion of Spine, Department of Orthopaedics and Traumatology, Faculty of Medicine, Universitas Indonesia-Cipto Mangunkusumo Hospital, Jakarta, Indonesia, Department of Orthopaedics and Traumatology, Faculty of Medicine, Universitas Indonesia-Cipto Mangunkusumo Hospital, Jakarta, Indonesia; Iskandar W.W., Department of Orthopaedics and Traumatology, Faculty of Medicine, Universitas Indonesia-Cipto Mangunkusumo Hospital, Jakarta, Indonesia; Winartomo A., Department of Orthopaedics and Traumatology, Faculty of Medicine, Universitas Indonesia-Cipto Mangunkusumo Hospital, Jakarta, Indonesia; Besri N.N., Department of Orthopaedics and Traumatology, Faculty of Medicine, Universitas Indonesia-Cipto Mangunkusumo Hospital, Jakarta, Indonesia; Sulaiman A.R., Department of Orthopaedics and Traumatology, Faculty of Medicine, Universitas Indonesia-Cipto Mangunkusumo Hospital, Jakarta, Indonesia