Submitted on: 18 September 2004.
Revised on: 22 November 2004.
Accepted on: 13 December 2004.
___________________Global Health-Science and Practice
Submitted on: 03 September 2008.
Revised on: 25 November 2008.
Accepted on: 19 December 2008.
___________________Global Health-Science and Practice
http://reply.papertrans.cn/2/109/10832/10832-13.png
Submitted on: 22 December 2021.
Revised on: 15 March 2022.
Accepted on: 12 April 2022.
___________________Global Health-Science and Practice
Submitted on: 20 August 2014.
Revised on: 20 November 2014.
Accepted on: 28 December 2014.
___________________Global Health-Science and Practice
Submitted on: 26 June 2014.
Revised on: 24 September 2014.
Accepted on: 10 October 2014.
___________________Global Health-Science and Practice
http://reply.papertrans.cn/2/109/10832/10832-17.png
http://reply.papertrans.cn/2/109/10832/10832-18.png
http://reply.papertrans.cn/2/109/10832/10832-19.png
Submitted on: 02 September 2013.
Revised on: 23 December 2013.
Accepted on: 09 January 2014.
___________________Global Health-Science and Practice