http://reply.papertrans.cn/1/39/3864/3864-11.png
Submitted on: 05 November 2011.
Revised on: 29 January 2012.
Accepted on: 03 March 2012.
___________________BMC Anesthesiology---BMC
Submitted on: 17 September 2019.
Revised on: 18 November 2019.
Accepted on: 07 January 2020.
___________________BMC Anesthesiology---BMC
http://reply.papertrans.cn/1/39/3864/3864-14.png
http://reply.papertrans.cn/1/39/3864/3864-15.png
http://reply.papertrans.cn/1/39/3864/3864-16.png
Submitted on: 03 July 2008.
Revised on: 23 October 2008.
Accepted on: 16 November 2008.
___________________BMC Anesthesiology---BMC
Submitted on: 10 July 2006.
Revised on: 31 August 2006.
Accepted on: 16 September 2006.
___________________BMC Anesthesiology---BMC
Submitted on: 23 November 2004.
Revised on: 23 March 2005.
Accepted on: 06 April 2005.
___________________BMC Anesthesiology---BMC
Submitted on: 18 February 2002.
Revised on: 06 April 2002.
Accepted on: 29 May 2002.
___________________BMC Anesthesiology---BMC