DOI:
10.1055/s-00000094
Zeitschrift für Gastroenterologie
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References
Potthoff P, Heinemann LA, Güther B.
A household panel as a tool for cost-effective health-related population surveys: validity of the “Healthcare Access Panel”.
German Medical Science 2004; 2: Doc5- , http://www.egms.de/en/gms/2004-2/000015.shtml
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