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- Vakgroep Economie van de Gezondheidszorg, Rijksuniversiteit Limburg, P.O. Box 616, 6200 MD Maastricht, the Netherlands
- Inspectorate of Health Protection, P.O. Box 5406, 2280 UK Rijswijk, the Netherlands
- National Institute of Public Health and Environmental Protection, P.O. Box 1. 3720BA Bilthoven, the Netherlands