[1] Eulji University Hospital,Department of Urology
[2] Eulji University School of Medicine,Department of Family Medicine, Healthcare System Ganagnam Center
[3] Seoul National University Hospital,Department of Statistics and Actuarial Science
[4] Soongsil University,Department of Medical Statistics
[5] The Catholic University of Korea,Department of Family Medicine, Supportive Care Center
[6] Samsung Medical Center,Department of Clinical Research Design & Evaluation, SAIHST
[7] Sungkyunkwan University,undefined