1. Department of Pathology, Korea University Ansan Hospital, Gyeonggi-do, Republic of Korea
2. Department of Materials Science and Engineering, Korea University, Seoul, Republic of Korea
3. Biomedical Research Center, Korea University Ansan Hospital, Gyeonggi-do, Republic of Korea
4. Department of Colorectal Surgery, Korea University Ansan Hospital, Gyeonggi-do, Republic of Korea