http://reply.papertrans.cn/1/19/1896/1896-21.png
http://reply.papertrans.cn/1/19/1896/1896-22.png
http://reply.papertrans.cn/1/19/1896/1896-23.png
http://reply.papertrans.cn/1/19/1896/1896-24.png
Submitted on: 14 December 2004.
Revised on: 10 April 2005.
Accepted on: 06 May 2005.
___________________Annals of Work Exposures and Health
http://reply.papertrans.cn/1/19/1896/1896-26.png
Submitted on: 31 October 2020.
Revised on: 03 December 2020.
Accepted on: 13 January 2021.
___________________Annals of Work Exposures and Health
http://reply.papertrans.cn/1/19/1896/1896-28.png
http://reply.papertrans.cn/1/19/1896/1896-29.png
http://reply.papertrans.cn/1/19/1896/1896-30.png