Wardoyo, S., Division of Cardiothoracic and Vascular Surgery, Department of Surgery, Faculty of Medicine, Universitas Indonesia/Cipto Mangunkusumo General Hospital, Jakarta, Indonesia; Kamal, A.F., Department of Orthopedics and Traumatology, Universitas Indonesia/Cipto Mangunkusumo General Hospital, Jakarta, Indonesia; Furqon, M.A., Resident of Cardiothoracic and Vascular Surgery, Faculty of Medicine, Universitas Indonesia/Cipto Mangunkusumo General Hospital, Jakarta, Indonesia; Grantomo, J., Resident of Cardiothoracic and Vascular Surgery, Faculty of Medicine, Universitas Indonesia/Cipto Mangunkusumo General Hospital, Jakarta, Indonesia; Hutami, W.D., Resident of Orthopaedic and Traumatology, Universitas Indonesia/Cipto Mangunkusumo General Hospital, Jakarta, Indonesia