1. World Health Organization. Cancer [Online]2021. Available: https://www.who.int/news-room/fact-sheets/detail/cancer. [Accessed 1.4.2021 2021].
2. Worldwide trends in gastric cancer mortality (1980–2011), with predictions to 2015, and incidence by subtype
3. GLOBOCAN. Estimated Cancer Incidence, Mortality and Prevalence Worldwide in 2012 [Online]2012. Available: http://www.globocaniarcfr/Pages/fact_sheets_canceraspx. [Accessed 1.4.2021 2021].
4. Stewart BW, Kleihues P. World cancer report 2003.