Faramarz Pourasghar*, Hossein Malekafzali, Alireza Kazemi, Johan Ellenius and Uno Fors
* Corresponding author: Faramarz Pourasghar Faramarz.pourasghar@ki.se
BMC Public Health 2008, 8:139 doi:10.1186/1471-2458-8-139
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