Submitted on: 07 July 2004.
Revised on: 13 October 2004.
Accepted on: 05 December 2004.
___________________EGYPTIAN JOURNAL OF VETERINARY SCIENCE
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Submitted on: 20 February 2011.
Revised on: 16 March 2011.
Accepted on: 05 May 2011.
___________________EGYPTIAN JOURNAL OF VETERINARY SCIENCE
Submitted on: 01 January 2001.
Revised on: 05 February 2001.
Accepted on: 04 April 2001.
___________________EGYPTIAN JOURNAL OF VETERINARY SCIENCE
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