1 Department of Urology, Chonbuk National University Medical School, and Research Institute of Clinical Medicine of Chonbuk National University, Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, 560-180, Republic of Korea.
2 Department of Anesthesiology and Pain Medicine, Chonbuk National University Medical School, and Research Institute of Clinical Medicine of Chonbuk National University, Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, 560-180, Republic of Korea. ruiwin3518@gmail.com.