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Submitted on: 12 July 2006.
Revised on: 08 August 2006.
Accepted on: 15 August 2006.
PLOS MEDICINE
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http://reply.papertrans.cn/3/250/24903/24903-24.png
Submitted on: 19 June 2007.
Revised on: 24 July 2007.
Accepted on: 29 July 2007.
PLOS MEDICINE---PUBLIC LIBRARY SCIENCE
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Submitted on: 29 April 2023.
Revised on: 15 May 2023.
Accepted on: 30 May 2023.
PLOS MEDICINE
Submitted on: 21 December 2004.
Revised on: 30 December 2004.
Accepted on: 04 January 2005.
PLOS MEDICINE---PUBLIC LIBRARY SCIENCE
http://reply.papertrans.cn/3/250/24903/24903-29.png
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