Submitted on: 20 March 2009.
Revised on: 29 June 2009.
Accepted on: 27 August 2009.
___________________BMJ Supportive & Palliative Care
Submitted on: 06 June 2008.
Revised on: 02 October 2008.
Accepted on: 02 November 2008.
___________________BMJ Supportive & Palliative Care
http://reply.papertrans.cn/1/40/3967/3967-33.png
http://reply.papertrans.cn/1/40/3967/3967-34.png
http://reply.papertrans.cn/1/40/3967/3967-35.png
http://reply.papertrans.cn/1/40/3967/3967-36.png