- Correspondence to: Dr S Kumagai, Department of Occupational Health, Osaka Prefectural Institute of Public Health, 1–3–69 Nakamichi, Higashinari-ku, Osaka 537–0025, Japan
- Accepted November 8, 2001
- First published June 1, 2002.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.