Submitted on: 17 January 2024.
Revised on: 08 February 2024.
Accepted on: 28 February 2024.
___________________JMIR Public Health and Surveillance
Submitted on: 17 April 2006.
Revised on: 18 June 2006.
Accepted on: 01 July 2006.
___________________JMIR Public Health and Surveillance
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http://reply.papertrans.cn/2/150/14907/14907-14.png
Submitted on: 26 February 2020.
Revised on: 06 May 2020.
Accepted on: 26 June 2020.
___________________JMIR Public Health and Surveillance
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Submitted on: 13 February 2019.
Revised on: 01 May 2019.
Accepted on: 17 June 2019.
___________________JMIR Public Health and Surveillance
Submitted on: 18 August 2015.
Revised on: 13 December 2015.
Accepted on: 27 December 2015.
___________________JMIR Public Health and Surveillance
http://reply.papertrans.cn/2/150/14907/14907-19.png
http://reply.papertrans.cn/2/150/14907/14907-20.png