| Affiliation: | 1. Department of Biosciences, University of Helsinki, Helsinki, Finland;2. Department of Health, National Institute for Health and Welfare, Helsinki, Finland;3. Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland;4. Skin and Allergy Hospital, Helsinki University Central Hospital & University of Helsinki, Helsinki, Finland;5. North Karelia Centre for Public Health, Joensuu, Finland;6. Petrozavodsk State University, Petrozavodsk, Russia;7. Hoiku Rehabilitation Centre, Hamina, Finland;8. Institute of Biotechnology, University of Helsinki, Helsinki, Finland;9. Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden;10. Department of Bacteriology and Immunology, University of Helsinki, Helsinki, Finland;11. Scientific Research Institute of Physiopulmonology, St. Petersburg, Russia |
