Modjtaba Zandian, Ioannis Ioakimidis, Jakob Bergström, Ulf Brodin, Cecilia Bergh, Michael Leon, Julian Shield and Per Södersten*
* Corresponding author: Per Södersten per.sodersten@ki.se
BMC Public Health 2012, 12:351 doi:10.1186/1471-2458-12-351
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