Memberships and Activities:
1984-1998 Korean Society for Vascular Surgery, Executive Board of Director
1988-2003 Korean Society of Transplantation, Executive Board of Director
2003-present Korean Society of Transplantation, Chairman, Board of Directors
1995-1998 Korean Society on Hemostasis and Thrombosis, Chairman, Board of Directors
1998-2003 Korean Society for Vascular Surgery, Chairman, Board of Directors
1998-2000 The Korean Surgical Society, Chairman, Publication Committee
2000-2002 The Korean Surgical Society, Chairman, Scientific Committee
2000-2002 Vice President, Asian Chapter of the International Union of Angiology
2003-present Auditor, Korean Tissue Engineering and Regenerative Medicine Society
1998-2000 Editor in Chief-Journal of The Korean Surgical Society