http://reply.papertrans.cn/2/199/19814/19814-21.png
http://reply.papertrans.cn/2/199/19814/19814-22.png
http://reply.papertrans.cn/2/199/19814/19814-23.png
Submitted on: 25 December 2015.
Revised on: 05 April 2016.
Accepted on: 28 May 2016.
___________________JOURNAL OF THE NATIONAL MEDICAL ASSOCIATION
http://reply.papertrans.cn/2/199/19814/19814-25.png
http://reply.papertrans.cn/2/199/19814/19814-26.png
http://reply.papertrans.cn/2/199/19814/19814-27.png
Submitted on: 09 December 2021.
Revised on: 14 January 2022.
Accepted on: 03 February 2022.
___________________JOURNAL OF THE NATIONAL MEDICAL ASSOCIATION
http://reply.papertrans.cn/2/199/19814/19814-29.png
Submitted on: 16 July 2001.
Revised on: 30 August 2001.
Accepted on: 24 October 2001.
___________________JOURNAL OF THE NATIONAL MEDICAL ASSOCIATION