1. Bray F, Ferlay J, Soerjomataram I, Siegel RL, Torre LA, Jemal A. Global cancer statistics 2018: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA Cancer J Clin. 2018; 68:394–424.
Article
2. Hooi JKY, Lai WY, Ng WK, Suen MMY, Underwood FE, Tanyingoh D, et al. Global prevalence of Helicobacter pylori infection: systematic review and meta-analysis. Gastroenterology. 2017; 153:420–9.
Article
3. Anderson WF, Rabkin CS, Turner N, Fraumeni JF Jr, Rosenberg PS, Camargo MC. The changing face of noncardia gastric cancer incidence among US non-Hispanic whites. J Natl Cancer Inst. 2018; 110:608–15.
Article
4. Luo G, Zhang Y, Guo P, Wang L, Huang Y, Li K. Global patterns and trends in stomach cancer incidence: age, period and birth cohort analysis. Int J Cancer. 2017; 141:1333–44.
Article
5. Eom BW, Jung KW, Won YJ, Yang H, Kim YW. Trends in gastric cancer incidence according to the clinicopathological characteristics in Korea, 1999-2014. Cancer Res Treat. 2018; 50:1343–50.
Article
6. Song M, Rabkin CS, Camargo MC. Gastric cancer: an evolving disease. Curr Treat Options Gastroenterol. 2018; 16:561–9.
Article
7. Bach JF. The effect of infections on susceptibility to autoimmune and allergic diseases. N Engl J Med. 2002; 347:911–20.
Article
8. Toh BH. Diagnosis and classification of autoimmune gastritis. Autoimmun Rev. 2014; 13:459–62.
Article
9. Wells GA, Shea B, O'Connell D, Peterson J, Welch V, Losos M, et al. The Newcastle-Ottawa Scale (NOS) for assessing the quality of nonrandomised studies in meta-analyses [Internet]. Ottawa: Ottawa Hospital Research Institute;2018. [cited 2018 Oct 5]. Available from:
http://www.ohri.ca/programs/clinical_epidemiology/oxford.asp.
10. Liberati A, Altman DG, Tetzlaff J, Mulrow C, Gotzsche PC, Ioannidis JP, et al. The PRISMA statement for reporting systematic reviews and meta-analyses of studies that evaluate health care interventions: explanation and elaboration. J Clin Epidemiol. 2009; 62:e1–34.
Article
11. Hemminki K, Liu X, Ji J, Sundquist J, Sundquist K. Autoimmune disease and subsequent digestive tract cancer by histology. Ann Oncol. 2012; 23:927–33.
Article
12. Landgren AM, Landgren O, Gridley G, Dores GM, Linet MS, Morton LM. Autoimmune disease and subsequent risk of developing alimentary tract cancers among 4.5 million US male veterans. Cancer. 2011; 117:1163–71.
Article
13. DerSimonian R, Laird N. Meta-analysis in clinical trials. Control Clin Trials. 1986; 7:177–88.
Article
14. Higgins JP, Thompson SG. Quantifying heterogeneity in a meta-analysis. Stat Med. 2002; 21:1539–58.
Article
15. Egger M, Davey Smith G, Schneider M, Minder C. Bias in meta-analysis detected by a simple, graphical test. BMJ. 1997; 315:629–34.
Article
16. Duval S, Tweedie R. Trim and fill: A simple funnel-plot-based method of testing and adjusting for publication bias in meta-analysis. Biometrics. 2000; 56:455–63.
Article
17. Blackburn EK, Callender ST, Dacie JV, Doll R, Girdwood RH, Mollin DL, et al. Possible association between pernicious anaemia and leukaemia: a prospective study of 1,625 patients with a note on the very high incidence of stomach cancer. Int J Cancer. 1968; 3:163–70.
Article
18. Brinton LA, Gridley G, Hrubec Z, Hoover R, Fraumeni JF Jr. Cancer risk following pernicious anaemia. Br J Cancer. 1989; 59:810–3.
Article
19. Eriksson S, Clase L, Moquist-Olsson I. Pernicious anemia as a risk factor in gastric cancer. The extent of the problem. Acta Med Scand. 1981; 210:481–4.
20. Hsing AW, Hansson LE, McLaughlin JK, Nyren O, Blot WJ, Ekbom A, et al. Pernicious anemia and subsequent cancer: a population-based cohort study. Cancer. 1993; 71:745–50.
Article
21. Kokkola A, Sjoblom SM, Haapiainen R, Sipponen P, Puolakkainen P, Jarvinen H. The risk of gastric carcinoma and carcinoid tumours in patients with pernicious anaemia: a prospective follow-up study. Scand J Gastroenterol. 1998; 33:88–92.
22. Mellemkjaer L, Gridley G, Moller H, Hsing AW, Linet MS, Brinton LA, et al. Pernicious anaemia and cancer risk in Denmark. Br J Cancer. 1996; 73:998–1000.
Article
23. Mosbech J, Videbaek A. Mortality from and risk of gastric carcinoma among patients with pernicious anaemia. Br Med J. 1950; 2:390–4.
Article
24. Murphy G, Dawsey SM, Engels EA, Ricker W, Parsons R, Etemadi A, et al. Cancer risk after pernicious anemia in the US elderly population. Clin Gastroenterol Hepatol. 2015; 13:2282–9. e1-4.
Article
25. Schafer LW, Larson DE, Melton LJ 3rd, Higgins JA, Zinsmeister AR. Risk of development of gastric carcinoma in patients with pernicious anemia: a population-based study in Rochester, Minnesota. Mayo Clin Proc. 1985; 60:444–8.
Article
26. Jorgensen J. The mortality among patients with pernicious anemia in Denmark and the incidence of gastric carcinoma among the same. Acta Med Scand. 1951; 139:472–81.
27. Vannella L, Lahner E, Osborn J, Bordi C, Miglione M, Delle Fave G, et al. Risk factors for progression to gastric neoplastic lesions in patients with atrophic gastritis. Aliment Pharmacol Ther. 2010; 31:1042–50.
Article
28. Berkson J, Butt HR, Comfort MW. Occurrence of gastric cancer in persons with achlorhydria and with pernicious anemia. Proc Staff Meet Mayo Clin. 1956; 31:583–96.
29. Carstensen B, Read SH, Friis S, Sund R, Keskimaki I, Svensson AM, et al. Cancer incidence in persons with type 1 diabetes: a five-country study of 9,000 cancers in type 1 diabetic individuals. Diabetologia. 2016; 59:980–8.
Article
30. Harding JL, Shaw JE, Peeters A, Cartensen B, Magliano DJ. Cancer risk among people with type 1 and type 2 diabetes: disentangling true associations, detection bias, and reverse causation. Diabetes Care. 2015; 38:264–70.
Article
31. Valent F. Diabetes mellitus and cancer of the digestive organs: an Italian population-based cohort study. J Diabetes Complications. 2015; 29:1056–61.
Article
32. Swerdlow AJ, Laing SP, Qiao Z, Slater SD, Burden AC, Botha JL, et al. Cancer incidence and mortality in patients with insulin-treated diabetes: a UK cohort study. Br J Cancer. 2005; 92:2070–5.
Article
33. O'Mara BA, Byers T, Schoenfeld E. Diabetes mellitus and cancer risk: a multisite case-control study. J Chronic Dis. 1985; 38:435–41.
34. Hsu PC, Lin WH, Kuo TH, Lee HM, Kuo C, Li CY. A population-based cohort study of all-cause and site-specific cancer incidence among patients with type 1 diabetes mellitus in Taiwan. J Epidemiol. 2015; 25:567–73.
Article
35. Bernatsky S, Ramsey-Goldman R, Labrecque J, Joseph L, Boivin JF, Petri M, et al. Cancer risk in systemic lupus: an updated international multi-centre cohort study. J Autoimmun. 2013; 42:130–5.
Article
36. Chang SH, Park JK, Lee YJ, Yang JA, Lee EY, Song YW, et al. Comparison of cancer incidence among patients with rheumatic disease: a retrospective cohort study. Arthritis Res Ther. 2014; 16:428.
Article
37. Yu KH, Kuo CF, Huang LH, Huang WK, See LC. Cancer risk in patients with inflammatory systemic autoimmune rheumatic diseases: a nationwide population-based dynamic cohort study in Taiwan. Medicine (Baltimore). 2016; 95:e3540.
38. Dreyer L, Faurschou M, Mogensen M, Jacobsen S. High incidence of potentially virus-induced malignancies in systemic lupus erythematosus: a long-term followup study in a Danish cohort. Arthritis Rheum. 2011; 63:3032–7.
Article
39. Seo HM, Han SS, Kim JS. Cancer risks among patients with alopecia areata: a population-based case-control study in Korea. J Am Acad Dermatol. 2018; 78:209–11.
Article
40. Stabler SP, Allen RH. Vitamin B12 deficiency as a worldwide problem. Annu Rev Nutr. 2004; 24:299–326.
Article
41. Ji J, Sundquist J, Sundquist K. Family history of autoimmune diseases and risk of gastric cancer: a national cohort study. Eur J Cancer Prev. 2018; 27:221–6.
Article