Submitted on: 11 July 2012.
Revised on: 31 October 2012.
Accepted on: 15 December 2012.
___________________Journal of the Egyptian National Cancer Institute
Submitted on: 31 December 2001.
Revised on: 27 March 2002.
Accepted on: 19 May 2002.
___________________Journal of the Egyptian National Cancer Institute
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