Submitted on: 28 November 2008.
Revised on: 18 January 2009.
Accepted on: 31 January 2009.
___________________Annals of the American Thoracic Society
Submitted on: 05 June 2016.
Revised on: 09 September 2016.
Accepted on: 06 November 2016.
___________________Annals of the American Thoracic Society
Submitted on: 25 January 2014.
Revised on: 31 March 2014.
Accepted on: 13 April 2014.
___________________Annals of the American Thoracic Society
http://reply.papertrans.cn/1/19/1873/1873-24.png
Submitted on: 07 July 2012.
Revised on: 07 October 2012.
Accepted on: 22 October 2012.
___________________Annals of the American Thoracic Society
http://reply.papertrans.cn/1/19/1873/1873-26.png
http://reply.papertrans.cn/1/19/1873/1873-27.png
http://reply.papertrans.cn/1/19/1873/1873-28.png
http://reply.papertrans.cn/1/19/1873/1873-29.png
http://reply.papertrans.cn/1/19/1873/1873-30.png