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vol. 33 no. 6 1261-1267
PubMed
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History
- Received July 4, 2008
- Accepted February 18, 2009
- Published online May 29, 2009.
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- previous version (February 27, 2009 - 07:20).
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Author Information
- 1Dept of Public Health and Clinical Medicine, Occupational and Environmental Medicine, Umeå University, Umeå. 2Dept of Occupational and Environmental Medicine, Respiratory Medicine and Allergology, Sahlgrenska University Hospital, Gothenburg, and 3Dept of Medical Sciences, Respiratory Medicine and Allergology, Uppsala University, Uppsala, Sweden.
- L. Modig, Dept of Public Health and Clinical Medicine, Occupational and Environmental Medicine, Umeå University, Umeå, Sweden. Fax: 46 907852456. E-mail: lars.modig{at}envmed.umu.se