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Ozge Karadag Caman, Susanna Calling, Patrik Midlöv*, Jan Sundquist, Kristina Sundquist and Sven-Erik Johansson
* Corresponding author: Patrik Midlöv Patrik.Midlov@med.lu.se
BMC Public Health 2013, 13:893 doi:10.1186/1471-2458-13-893