1. Peptic ulcer disease in a general adult population: the Kalixanda study: a random population-based study;P Aro;Am J Epidemiol,2006
2. Physical activity and peptic ulcers. Does physical activity reduce the risk of developing peptic ulcers?;Y Cheng;West J Med,2000
3. The prevalence of self-reported peptic ulcer in the United States;A Sonnenberg;Am J Public Health,1996
4. JAMA patient page. Peptic ulcer disease;JM Torpy;JAMA,2012
5. Bae SJ, Kim DS, Kim KM, Park CM, Kim HY: Health Insurance Review and Assessment Service (HIRA). Studies on the occurrence of peptic ulcer disease and health care utilization patterns in Korean. A research report of HIRA (2010–05). 25 June 2010. https://www.hira.or.kr/dummy.do?pgmid=HIRAA020045010000&cmsurl=/cms/medi_info/07/03/01/stats_data.html&subject=%3Cspan%3E%ED%86%B5%EA%B3%84%EC%9E%90%EB%A3%8C%EC%8B%A4%3C%2fspan%3E. Cited 3 April 2017.