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Pieter Van Baal Centre for Prevention and Health Services Research (pb 101) National Institute of Public Health and the environment PO Box 1 3720 BA Bilthoven The Netherlands Tel: +31 30 274 3152 / Fax: +31 30 274 4407 E-mail: Pieter.van.Baal@rivm.nl Homepage: www.rivm.nl Jaap van den Berg Statistics Netherlands PO Box 4481 6401 CZ Heerlen The Netherlands Tel: +31 45 570 7419 / Fax: +31 45 570 6272 E-mail: jbrg@cbs.nl Anneke van den Berg Jeths Geertrudis A. M. van den ...
