Bosma Hans, Simons Audrey, Groffen Daniëlle A I, Klabbers Gonnie
Maastricht University, CAPHRI, Department of Social Medicine, PO Box 616, 6200 MD Maastricht, The Netherlands.
Eur J Public Health. 2012 Oct;22(5):616-7. doi: 10.1093/eurpub/cks072. Epub 2012 Jun 8.