1. Crohn’s disease with gastroduodenal involvement: diagnostic approach;Ingle SB;World J Clin Cases,2015
2. Proximal Crohn's disease: review of the clinicopathologic features and therapy;van Hogezand RA;Inflamm Bowel Dis,2001
3. Upper gastrointestinal tract Crohn’s disease;Loftus EV Jr;Clin Perspect Gastroenterol,2002
4. Gastroduodenal Crohn's disease;Kefalas CH;Proc (Bayl Univ Med Cent),2003
5. Ulcerative colitis in Olmsted County, Minnesota, 1940-1993: incidence, prevalence, and survival;Loftus EV Jr;Gut,2000