1. Department of Urology, Chonnam National University Medical School, Chonnam National University Sexual Medicine Research Center, Gwangju, Korea.
2. Nano Convergence and Manufacturing Systems Research Division, Korea Institute of Machinery and Materials (KIMM), Daejeon, Korea.
3. MEMS and Nanotechnology Laboratory, School of Mechanical Systems Engineering, Chonnam National University, Gwangju, Korea.