1. Joint Institute for Regenerative Medicine, Kyungpook National University Hospital, Daegu, Korea.
2. Department of Urology, CHA Gumi Medical Center, CHA University, Gumi, Korea.
3. Department of Pathology, Kyungpook National University Hospital, Daegu, Korea.
4. Department of Urology, Kyungpook National University Hospital, Daegu, Korea.
5. Wake Forest Institute for Regenerative Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA.