Article Information
PubMed
History
- Published online May 8, 2006.
Copyright & Usage
© 2006 CMA Media Inc. or its licensors
Author Information
- Anne-Marie Nybo Andersen,
- Laust H. Mortensen
- Anne-Marie Nybo Andersen and Laust H. Mortensen are from the National Institute of Public Health, Copenhagen, Denmark.
- Correspondence to:
Dr. Anne-Marie Nybo Andersen, National Institute of Public Health, Oster Farimagsgade 5A2, Copenhagen K, 1399, Denmark; ana{at}niph.dk