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Twenty-five year trends in prevalence of chronic bronchitis and the trends in relation to smoking |
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| Affiliation: | 1. Department of Pulmonary Diseases, Kuopio University Hospital, Kuopio, Finland;2. Finnish Information Centre for Register Research, Helsinki, Finland;3. Institute for Health and Welfare, Helsinki, Finland;4. Institute for Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland |
| Abstract: | |
| Keywords: | Chronic bronchitis Prevalence Trends Smoking |
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