[1] Univ Lampung, Dept Urol, Fac Med, Abdul Moeloek Gen Hosp, Lampung, Indonesia
[2] Univ Lampung, Fac Med, Dept Urol, Lampung, Indonesia
[3] Kardinah Hosp, Dept Surg, Tegal, Central Java, Indonesia
[4] Univ Gadjah Mada, Dept Surg, Dr Sardjito Gen Hosp, Fac Med, Yogyakarta, Indonesia