Article Information
vol. 28 no. 4 756-762
PubMed
Published By
Print ISSN
Online ISSN
History
- Received August 1, 2005
- Accepted May 23, 2006
- Published online September 29, 2006.
Article Versions
- previous version (May 31, 2006 - 00:00).
- You are viewing the most recent version of this article.
Copyright & Usage
© ERS Journals Ltd
Author Information
- 1Dept of Public Health and Epidemiology, University of Birmingham, Birmingham, UK. 2Faculty of Medicine, Ain Shams University, Cairo, Egypt.
- S. Walters, Dept of Public Health and Epidemiology, Public Health Building, University of Birmingham, Birmingham, B15 2TT, UK. Fax: 44 1214147878. E-mail: s.walters{at}bham.ac.uk