Career
| 1987–1988 | Internship in Seoul National University Hospital |
|---|---|
| 1988–1991 | Served in Korean Army |
| 1991–1995 | Residency of Internal Medicine in Seoul National University Hospital |
| 1995–1996 | Fellowship in Division of Gastroenterology, Seoul National University Hospital |
| 1996–1998 | Instructor of Internal medicine, Chung Ang University College of Medicine |
| 1998–2002 | Assistant Professor of Internal medicine, Chung Ang University College of Medicine |
| 2001.03–2003.02 | Postdoctoral fellow, Lab of Mucosal Immunology, UCSD |
| 2002–2007.02 | Associate Professor of Internal medicine, Chung Ang University College of Medicine |
| 2007.03–present | Professor of Internal Medicine, Chung-Ang University College of Medicine |
| 2006.12–2008.12 | Chair of Scientific Committee of Korean College of Helicobacter and Upper Gastrointestinal Research |
| 2011.11–2013.11 | Director of the Scientific Board, The Korean Society of Gastroenterology |
| 2011.11–present | Director of Gastroenterology Center, Chung-Ang University Hospital |
| 2013.10–present | Director of clinical practice guideline committee, The Korean Association of Internal Medicine |
| 2014.03–present | Head of Internal Medicine, Chung-Ang University College of Medicine |
