1) Clinical Outcomes of Surgical Therapy Study Group. A comparison of laparoscopically assisted and open colectomy for colon cancer. N Engl J Med 350:2050-2059, 2004
2) Guillou PJ, Quirke P, Thorpe H, et al. Short-term endpoints of conventional versus laparoscopic-assisted surgery in patients with colorectal cancer(MRC CLASICC trial);multicentre, randomised controlled trial. Lancet 365:1718-1726, 2005
3) Lacy AM, Garcia-Valdecasas JC, Delgado S, et al. Laparoscopy-assisted colectomy versus open colectomy for treatment of non-metastatic colon cancer:a randomised trial. Lancet 359:2224-2229, 2002
4) Kitano S, Inomata M, Sato A, et al. Randomized controlled trial to evaluate laparoscopic surgery for colorectal cancer:Japan Clinical Oncology Group Study JCOG0404. Jpn J Clin Oncol 35:475-477, 2005
5)内視鏡外科手術に関するアンケート調査―第8回集計結果報告.日鏡外会誌 11:556-562, 2006
6) Watanabe M, Hasegawa H, Yamamoto S, et al. Successful application of laparoscopic surgery to the treatment of Crohn's disease with fistulas. Dis Colon Rectum 45:1057-1061, 2002
7) Hasegawa H, Wataanbe M, Nishibori H, et al. Laparoscopic surgery for recurrent Crohn's disease. Br J Surg 90:970-973, 2003
8) Okabayashi K, Hasegawa H, Watanabe M, et al. Indications for laparoscopic surgery for Crohn's disease using the Vienna Classification. Colorectal Dis 9:825-829, 2007
9) Gasche C, Scholmerich J, Brynskov J, et al. A simple classification of Crohn's disease:report of the Working Party for the World Congresses of Gastroenterology, Vienna 1998. Inflamm Bowel Dis 6:8-15, 2000