Submitted on: 18 May 2011.
Revised on: 23 July 2011.
Accepted on: 26 August 2011.
___________________Annals of Thoracic Medicine---WOLTERS KLUWER MEDKNOW PUBLICATIONS
http://reply.papertrans.cn/1/19/1884/1884-32.png
http://reply.papertrans.cn/1/19/1884/1884-33.png
Submitted on: 18 July 2010.
Revised on: 29 October 2010.
Accepted on: 15 November 2010.
___________________Annals of Thoracic Medicine---WOLTERS KLUWER MEDKNOW PUBLICATIONS
Submitted on: 05 October 2013.
Revised on: 14 January 2014.
Accepted on: 12 February 2014.
___________________Annals of Thoracic Medicine---WOLTERS KLUWER MEDKNOW PUBLICATIONS
http://reply.papertrans.cn/1/19/1884/1884-36.png