Submitted on: 25 April 2001.
Revised on: 17 May 2001.
Accepted on: 26 May 2001.
PLoS One
Submitted on: 25 September 2005.
Revised on: 04 November 2005.
Accepted on: 16 November 2005.
PLoS One---PUBLIC LIBRARY SCIENCE
Submitted on: 17 December 2006.
Revised on: 23 January 2007.
Accepted on: 16 February 2007.
PLoS One
http://reply.papertrans.cn/3/250/24906/24906-14.png
Submitted on: 03 September 2019.
Revised on: 29 September 2019.
Accepted on: 10 October 2019.
PLoS One---PUBLIC LIBRARY SCIENCE
http://reply.papertrans.cn/3/250/24906/24906-16.png
http://reply.papertrans.cn/3/250/24906/24906-17.png
Submitted on: 09 February 2022.
Revised on: 18 February 2022.
Accepted on: 09 March 2022.
PLoS One---PUBLIC LIBRARY SCIENCE
http://reply.papertrans.cn/3/250/24906/24906-19.png
Submitted on: 02 February 1998.
Revised on: 09 February 1998.
Accepted on: 24 February 1998.
PLoS One---PUBLIC LIBRARY SCIENCE