1. Korean National Statistical Office. Annual report on the cause of death statistics. 2007. Daejeon: Korea National Statistical Office.
2. Fukutomi H, Sakita T. Analysis of early gastric cancer cases collected from major hospitals and institutes in Japan. Jpn J Clin Oncol. 1984. 14:169–179.
3. Itoh H, Oohata Y, Nakamura K, Nagata T, Mibu R, Nakayama F. Complete ten-year postgastrectomy follow-up of early gastric cancer. Am J Surg. 1989. 158:14–16.
4. Ewing J. The beginnings of gastric cancer. Am J Surg. 1936. 31:204.
5. Mallory TB. Carcinoma in situ of the stomach and its bearing on histogenesis of malignant ulcers. Arch Pathol. 1940. 30:348.
6. Tsukuma H, Oshima A, Narahara H, Morii T. Natural history of early gastric cancer: a non-concurrent, long term, follow up study. Gut. 2000. 47:618–621.
7. Sue-Ling HM, Martin I, Griffith J, et al. Early gastric cancer: 46 cases treated in one surgical department. Gut. 1992. 33:1318–1322.
8. Fujita S. Biology of early gastric carcinoma. Pathol Res Pract. 1978. 163:297–309.
9. Tsukuma H, Ioka A, Iishi H, Yamazaki H. Prospective study of early gastric cancer with considerations concerning clinical practice for gastric cancer. Stomach Intest. 2008. 43:1375–1381.
10. Tsukuma H, Mishima T, Oshima A. Prospective study of "early" gastric cancer. Int J Cancer. 1983. 31:421–426.
11. Axon A. Natural history of early gastric cancer. Gut. 2000. 47:609.
12. Matsui T, Yao T. Natural history of gastric cancer. Nihon Rinsho. 2001. 59:Suppl 4. 583–588.
13. Matsui T, Nagahama T, Chonan A, Imamura A, Kobayashi H, Yoshino J. Natural history of early gastric cancer-multicenter follow up study. Stomach Intest. 2008. 43:1396–1407.