Speybroeck Niko, Devleesschauwer Brecht, Joseph Lawrence, Berkvens Dirk
Institute of Health and Society, Université catholique de Louvain, Brussels, Belgium,
Int J Public Health. 2013 Oct;58(5):791-5. doi: 10.1007/s00038-012-0439-9. Epub 2012 Dec 20.