1. Jemal A, Bray F, Center MM, Ferlay J, Ward E, Forman D. Global cancer statistics. CA Cancer J Clin. 2011; 61:69–90.
3. Jeong O, Park YK. Clinicopathological features and surgical treatment of gastric cancer in South Korea: the results of 2009 nationwide survey on surgically treated gastric cancer patients. J Gastric Cancer. 2011; 11:69–77.
4. Jung KW, Won YJ, Oh CM, Kong HJ, Cho H, Lee DH, et al. Prediction of cancer incidence and mortality in Korea, 2015. Cancer Res Treat. 2015; 47:142–148.
5. Kobayashi D, Kodera Y, Fujiwara M, Koike M, Nakayama G, Nakao A. Assessment of quality of life after gastrectomy using EORTC QLQ-C30 and STO22. World J Surg. 2011; 35:357–364.
6. Macintyre IM, Akoh JA. Improving survival in gastric cancer: review of operative mortality in English language publications from 1970. Br J Surg. 1991; 78:771–776.
7. Maruyama K, Okabayashi K, Kinoshita T. Progress in gastric cancer surgery in Japan and its limits of radicality. World J Surg. 1987; 11:418–425.
8. Korenaga D, Tsujitani S, Haraguchi M, Okamura T, Tamada R, Sugimachi K, et al. Long-term survival in Japanese patients with far advanced carcinoma of the stomach. World J Surg. 1988; 12:236–240.
9. Köckerling F, Reck T, Gall FP. Extended gastrectomy: who benefits? World J Surg. 1995; 19:541–545.
10. McCall MD, Graham PJ, Bathe OF. Quality of life: a critical outcome for all surgical treatments of gastric cancer. World J Gastroenterol. 2016; 22:1101–1113.
11. Aaronson NK, Ahmedzai S, Bergman B, Bullinger M, Cull A, Duez NJ, et al. The European organization for research and treatment of cancer QLQ-C30: a quality-of-life instrument for use in international clinical trials in oncology. J Natl Cancer Inst. 1993; 85:365–376.
12. Sprangers MA, Cull A, Groenvold M, Bjordal K, Blazeby J, Aaronson NK. EORTC quality of life study group. The European organization for research and treatment of cancer approach to developing questionnaire modules: an update and overview. Qual Life Res. 1998; 7:291–300.
13. Kaasa S, Bjordal K, Aaronson N, Moum T, Wist E, Hagen S, et al. The EORTC core quality of life questionnaire (QLQ-C30): validity and reliability when analysed with patients treated with palliative radiotherapy. Eur J Cancer. 1995; 31A:2260–2263.
14. van der Schaaf M, Derogar M, Lagergren P. Reference values of oesophago-gastric symptoms (EORTC QLQ-OG25) in a population-based setting. Eur J Cancer. 2012; 48:1602–1607.
15. Fayers P, Bottomley A. EORTC Quality of Life Group. Quality of Life Unit. Quality of life research within the EORTC-the EORTC QLQ-C30. European organisation for research and treatment of cancer. Eur J Cancer. 2002; 38:Suppl 4. S125–S133.
16. Botterweck AA, Schouten LJ, Volovics A, Dorant E, van Den Brandt PA. Trends in incidence of adenocarcinoma of the oesophagus and gastric cardia in ten European countries. Int J Epidemiol. 2000; 29:645–654.
17. Ferro A, Peleteiro B, Malvezzi M, Bosetti C, Bertuccio P, Levi F, et al. Worldwide trends in gastric cancer mortality (1980-2011), with predictions to 2015, and incidence by subtype. Eur J Cancer. 2014; 50:1330–1344.
18. Tomaszewski KA, Püsküllüoğlu M, Biesiada K, Bochenek J, Nieckula J, Krzemieniecki K. Validation of the polish version of the eortc QLQ-C30 and the QLQ-OG25 for the assessment of health-related quality of life in patients with esophagi-gastric cancer. J Psychosoc Oncol. 2013; 31:191–203.
19. Kim AR, Cho J, Hsu YJ, Choi MG, Noh JH, Sohn TS, et al. Changes of quality of life in gastric cancer patients after curative resection: a longitudinal cohort study in Korea. Ann Surg. 2012; 256:1008–1013.
20. Oñate-Ocaña LF, Velázquez-Monroy N, Vázquez L, Espinosa-Mireles-de-Villafranca P, Núñez-Rosas E, Ovando-Lezama M, et al. Clinical validation of the EORTC QLQ-OG25 questionnaire for the evaluation of health-related quality of life in Mexican patients with esophagogastric cancers. Psychooncology. 2012; 21:745–753.
21. Nakada K, Ikeda M, Takahashi M, Kinami S, Yoshida M, Uenosono Y, et al. Characteristics and clinical relevance of post-gastrectomy syndrome assessment scale (PGSAS)-45: newly developed integrated questionnaires for assessment of living status and quality of life in postgastrectomy patients. Gastric Cancer. 2015; 18:147–158.