Aimée E van Dijk*, Manon van Eijsden, Karien Stronks, Reinoud JBJ Gemke and Tanja GM Vrijkotte
* Corresponding author: Aimée E van Dijk a.e.vandijk@amc.uva.nl
BMC Public Health 2010, 10:251 doi:10.1186/1471-2458-10-251
Fields marked * are required