http://reply.papertrans.cn/1/18/1781/1781-11.png
http://reply.papertrans.cn/1/18/1781/1781-12.png
http://reply.papertrans.cn/1/18/1781/1781-13.png
Submitted on: 18 August 2016.
Revised on: 01 November 2016.
Accepted on: 21 December 2016.
___________________ANNALS OF FAMILY MEDICINE---ANNALS FAMILY MEDICINE
http://reply.papertrans.cn/1/18/1781/1781-15.png
http://reply.papertrans.cn/1/18/1781/1781-16.png
http://reply.papertrans.cn/1/18/1781/1781-17.png
Submitted on: 22 July 2003.
Revised on: 13 September 2003.
Accepted on: 31 October 2003.
___________________ANNALS OF FAMILY MEDICINE---ANNALS FAMILY MEDICINE
http://reply.papertrans.cn/1/18/1781/1781-19.png
http://reply.papertrans.cn/1/18/1781/1781-20.png