Prapiska F.F., Division of Urology, Department of Surgery, Faculty of Medicine, Universitas Sumatera Utara – Haji Adam Malik General Hospital, Medan, Indonesia; Nabil R.A., 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, Faculty of Medicine, Universitas Sumatera Utara – Universitas Sumatera Utara Hospital, Medan, Indonesia; Sihombing B., Division of Urology, Department of Surgery, Faculty of Medicine, Universitas Sumatera Utara – Haji Adam Malik General Hospital, Medan, Indonesia; Kadar D.D., Division of Urology, Department of Surgery, Faculty of Medicine, Universitas Sumatera Utara – Haji Adam Malik General Hospital, Medan, Indonesia; Siregar G.P., Division of Urology, Department of Surgery, Faculty of Medicine, Universitas Sumatera Utara – Haji Adam Malik General Hospital, Medan, Indonesia