Recruitment of participants in the Lung Health Study, I: Description of Methods
| Autor: | Durkin, Deborah A., Kjelsberg, Marcus O., Sonia Buist, A., Connett, John E., Owens, Gregory R. |
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| Zdroj: | In Controlled Clinical Trials 1993 14(2) Supplement:20-37 |
| Databáze: | ScienceDirect |
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