Submitted on: 05 October 2011.
Revised on: 29 October 2011.
Accepted on: 11 December 2011.
___________________BMC Medical Ethics---BMC
Submitted on: 05 June 2007.
Revised on: 11 August 2007.
Accepted on: 07 October 2007.
___________________BMC Medical Ethics---BMC
http://reply.papertrans.cn/1/39/3897/3897-33.png
Submitted on: 22 October 2013.
Revised on: 02 December 2013.
Accepted on: 22 December 2013.
___________________BMC Medical Ethics---BMC
Submitted on: 26 August 2012.
Revised on: 31 October 2012.
Accepted on: 22 November 2012.
___________________BMC Medical Ethics---BMC
http://reply.papertrans.cn/1/39/3897/3897-36.png