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Keywords: Completeness
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Journal Articles
Ann Nutr Metab (1999) 43 (4): 225–234.
Published Online: 09 December 1999
... in a 95% return of the questionnaire in Potsdam and 90% in Heidelberg. The system of follow-up data entry and control, including completion of missing information via telephone, verification of self-reports and causes of death, has been set up for EPIC-Germany and works efficiently and successfully...