Ramon R., Department of Urology, Faculty of Medicine, Universitas Indonesia, Haji Adam Malik General Hospital, Medan, Indonesia; Warli S.M., Division of Urology, Department of Surgery, Faculty of Medicine, Universitas Sumatera Utara, Haji Adam Malik General Hospital, Medan, Indonesia, Department of Urology, Universitas Sumatera Utara Hospital, Universitas Sumatera Utara, Medan, Indonesia; Rasyid N., Department of Urology, Faculty of Medicine, Universitas Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia; Atmoko W., Department of Urology, Faculty of Medicine, Universitas Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia