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Submitted on: 29 April 2002.
Revised on: 05 July 2002.
Accepted on: 25 August 2002.
___________________Hematology-American Society of Hematology Education Program
http://reply.papertrans.cn/2/113/11211/11211-33.png
Submitted on: 26 April 2012.
Revised on: 05 August 2012.
Accepted on: 09 September 2012.
___________________Hematology-American Society of Hematology Education Program
http://reply.papertrans.cn/2/113/11211/11211-35.png
Submitted on: 14 February 2002.
Revised on: 28 March 2002.
Accepted on: 23 May 2002.
___________________Hematology-American Society of Hematology Education Program