http://reply.papertrans.cn/2/168/16780/16780-21.png
http://reply.papertrans.cn/2/168/16780/16780-22.png
http://reply.papertrans.cn/2/168/16780/16780-23.png
http://reply.papertrans.cn/2/168/16780/16780-24.png
Submitted on: 07 March 2004.
Revised on: 06 April 2004.
Accepted on: 14 May 2004.
___________________Journal of Family and Community Medicine
http://reply.papertrans.cn/2/168/16780/16780-26.png
http://reply.papertrans.cn/2/168/16780/16780-27.png
http://reply.papertrans.cn/2/168/16780/16780-28.png
http://reply.papertrans.cn/2/168/16780/16780-29.png
Submitted on: 29 June 2019.
Revised on: 08 August 2019.
Accepted on: 19 August 2019.
___________________Journal of Family and Community Medicine