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Submitted on: 30 September 1999.
Revised on: 28 November 1999.
Accepted on: 01 January 2000.
___________________INDUSTRIAL HEALTH---NATL INST OCCUPATIONAL SAFETY & HEALTH, JAPAN
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Submitted on: 01 January 2005.
Revised on: 24 February 2005.
Accepted on: 29 March 2005.
___________________INDUSTRIAL HEALTH---NATL INST OCCUPATIONAL SAFETY & HEALTH, JAPAN
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Submitted on: 04 February 2011.
Revised on: 11 May 2011.
Accepted on: 07 June 2011.
___________________INDUSTRIAL HEALTH---NATL INST OCCUPATIONAL SAFETY & HEALTH, JAPAN