References

1. Jackson PE. Baillieres best pract pres clin gastroenterol. Dec 1999; 13(4):545-55.

2. Sabiston Jr DC. Texbook of surgery. 15th ed. Philadelphia: W.B. Saunders, 1997.

3. Schwartz SI, Shires GT, Spencer FC. Principles of surgery. 7th ed. New York: McGraw Hill, 1999.

4. Sharma MP. Indian J Gastroenterol 2001; 20(Suppl 1):C33-6.

5. Sleisenger & fordtran's gastrointestinal and liver disease. 6th ed. Philadelphia: W.B. Saunders, 1998.

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