Submitted on: 09 November 2009.
Revised on: 05 December 2009.
Accepted on: 19 January 2010.
___________________Indian Journal of Occupational and Environmental Medicine
Submitted on: 07 July 2012.
Revised on: 23 October 2012.
Accepted on: 12 December 2012.
___________________Indian Journal of Occupational and Environmental Medicine
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http://reply.papertrans.cn/2/124/12389/12389-24.png
Submitted on: 25 June 2017.
Revised on: 22 September 2017.
Accepted on: 31 October 2017.
___________________Indian Journal of Occupational and Environmental Medicine
Submitted on: 10 March 2002.
Revised on: 15 May 2002.
Accepted on: 10 June 2002.
___________________Indian Journal of Occupational and Environmental Medicine
Submitted on: 10 July 2012.
Revised on: 15 September 2012.
Accepted on: 11 November 2012.
___________________Indian Journal of Occupational and Environmental Medicine
http://reply.papertrans.cn/2/124/12389/12389-28.png
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Submitted on: 07 July 2002.
Revised on: 27 October 2002.
Accepted on: 24 November 2002.
___________________Indian Journal of Occupational and Environmental Medicine