Submitted on: 04 February 2012.
Revised on: 17 March 2012.
Accepted on: 10 April 2012.
___________________American Journal of Cancer Research
Submitted on: 16 June 2000.
Revised on: 01 September 2000.
Accepted on: 21 October 2000.
___________________American Journal of Cancer Research
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Submitted on: 08 July 1998.
Revised on: 26 October 1998.
Accepted on: 15 November 1998.
___________________American Journal of Cancer Research