Submitted on: 25 January 2000.
Revised on: 15 March 2000.
Accepted on: 03 April 2000.
___________________Journal of Cancer---IVYSPRING INT PUBL
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Submitted on: 30 June 2012.
Revised on: 23 October 2012.
Accepted on: 12 December 2012.
___________________Journal of Cancer---IVYSPRING INT PUBL
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Submitted on: 27 December 2007.
Revised on: 05 March 2008.
Accepted on: 17 April 2008.
___________________Journal of Cancer---IVYSPRING INT PUBL
Submitted on: 08 September 1998.
Revised on: 08 November 1998.
Accepted on: 31 December 1998.
___________________Journal of Cancer---IVYSPRING INT PUBL