http://reply.papertrans.cn/1/40/3930/3930-31.png
Submitted on: 21 July 2009.
Revised on: 22 October 2009.
Accepted on: 16 November 2009.
___________________BMC Research Notes---SPRINGERNATURE
Submitted on: 17 July 2003.
Revised on: 21 August 2003.
Accepted on: 11 September 2003.
___________________BMC Research Notes---SPRINGERNATURE
http://reply.papertrans.cn/1/40/3930/3930-34.png
http://reply.papertrans.cn/1/40/3930/3930-35.png
Submitted on: 01 February 2001.
Revised on: 29 April 2001.
Accepted on: 17 June 2001.
___________________BMC Research Notes---SPRINGERNATURE