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Time trends in the use of field-substitution in the Belgian health interview survey
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Socio-economic differences in participation of households in a Belgian national health survey
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Sample substitution can be an acceptable data-collection strategy: the case of the Belgian Health Interview Survey
Measurement agreement of the selfadministered questionnaire of the Belgian Health Interview Survey: Paper-and-pencil versus web-based mode
Measurement agreement of the self-administered questionnaire of the Belgian Health Interview Survey: Paper-and-pencil versus web-based mode