http://reply.papertrans.cn/3/206/20519/20519-21.png
http://reply.papertrans.cn/3/206/20519/20519-22.png
http://reply.papertrans.cn/3/206/20519/20519-23.png
Submitted on: 11 September 2002.
Revised on: 03 October 2002.
Accepted on: 18 October 2002.
Lancet Respiratory Medicine---ELSEVIER SCI LTD
Submitted on: 26 February 2021.
Revised on: 16 March 2021.
Accepted on: 22 March 2021.
Lancet Respiratory Medicine
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http://reply.papertrans.cn/3/206/20519/20519-27.png
Submitted on: 06 January 2010.
Revised on: 04 February 2010.
Accepted on: 24 February 2010.
Lancet Respiratory Medicine
http://reply.papertrans.cn/3/206/20519/20519-29.png
Submitted on: 03 August 2000.
Revised on: 19 August 2000.
Accepted on: 05 September 2000.
Lancet Respiratory Medicine---ELSEVIER SCI LTD