Comparison of Open and Closed Questionnaire Formats in Obtaining Demographic Information From Canadian General Internists
| Autor: | Griffith, L.E. *, Cook, D.J., Guyatt, G.H., Charles, C.A. |
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| Zdroj: | In Journal of Clinical Epidemiology 1999 52(10):997-1005 |
| Databáze: | ScienceDirect |
| Externí odkaz: |
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