http://reply.papertrans.cn/2/136/13504/13504-31.png
http://reply.papertrans.cn/2/136/13504/13504-32.png
http://reply.papertrans.cn/2/136/13504/13504-33.png
http://reply.papertrans.cn/2/136/13504/13504-34.png
Submitted on: 06 February 2000.
Revised on: 16 May 2000.
Accepted on: 26 June 2000.
___________________INTERNATIONAL JOURNAL OF HEALTH SERVICES
Submitted on: 03 July 2020.
Revised on: 29 October 2020.
Accepted on: 19 December 2020.
___________________INTERNATIONAL JOURNAL OF HEALTH SERVICES