Beatrice Gross*, Leonie Brose, Anja Schumann, Sabina Ulbricht, Christian Meyer, Henry Völzke, Hans-Jürgen Rumpf and Ulrich John
* Corresponding author: Beatrice Gross beatrice.gross@uni-greifswald.de
BMC Public Health 2008, 8:129 doi:10.1186/1471-2458-8-129
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