http://reply.papertrans.cn/1/40/3917/3917-11.png
Submitted on: 29 April 2007.
Revised on: 19 July 2007.
Accepted on: 13 September 2007.
___________________BMC Palliative Care---BMC
Submitted on: 02 February 2010.
Revised on: 25 May 2010.
Accepted on: 13 July 2010.
___________________BMC Palliative Care---BMC
Submitted on: 13 July 2012.
Revised on: 30 August 2012.
Accepted on: 12 October 2012.
___________________BMC Palliative Care---BMC
http://reply.papertrans.cn/1/40/3917/3917-15.png
http://reply.papertrans.cn/1/40/3917/3917-16.png
Submitted on: 24 March 2003.
Revised on: 02 June 2003.
Accepted on: 01 July 2003.
___________________BMC Palliative Care---BMC
http://reply.papertrans.cn/1/40/3917/3917-18.png
Submitted on: 21 August 2015.
Revised on: 15 November 2015.
Accepted on: 26 December 2015.
___________________BMC Palliative Care---BMC
Submitted on: 12 August 2019.
Revised on: 19 September 2019.
Accepted on: 10 October 2019.
___________________BMC Palliative Care---BMC