1. Department of Urology, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea;
2. Department of Urology, Pusan National University Hospital, Pusan National University School of Medicine, Busan, Republic of Korea;
3. Department of Internal Medicine, Pusan National University Hospital, Pusan National University School of Medicine, Busan, Republic of Korea