Matilda Annerstedt*, Per-Olof Östergren, Jonas Björk, Patrik Grahn, Erik Skärbäck and Peter Währborg
* Corresponding author: Matilda Annerstedt Matilda.annerstedt@slu.se
BMC Public Health 2012, 12:337 doi:10.1186/1471-2458-12-337