1. [1] Zinner MJ, WAshley S. Maingot's abdominal operations 12th edn. McGraw-Hill Education 2013: p. 585.
2. Abdominal pain: a surgical audit of 1190 emergency admissions;Irvin;Br J Surg,1989
3. [3] Zinner MJ, WAshley S. Maingot's abdominal operations 12th edn. McGraw-Hill Education 2013: p. 587.
4. [4] Zinner MJ, WAshley S. Maingot's abdominal operations 12th edn. McGraw-Hill Education 2013: p. 588.
5. [5] Ashley SW. ACS surgery: principles and practices. Vol. 2. 7th edn. Decker Intellectual Properties 2014: p. 793.