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Kristina Edvardsson*, Anneli Ivarsson, Eva Eurenius, Rickard Garvare, Monica E Nyström, Rhonda Small and Ingrid Mogren
* Corresponding author: Kristina Edvardsson kristina.edvardsson@epiph.umu.se
BMC Public Health 2011, 11:936 doi:10.1186/1471-2458-11-936