Mohler-Kuo Meichun, Jann Ben, Dey Michelle, Zellweger Ueli
Institute of Social and Preventive Medicine, University of Zurich, Hirschengraben 84, 8001 Zurich, Switzerland.
Int J Public Health. 2011 Jun;56(3):353-6. doi: 10.1007/s00038-011-0250-z. Epub 2011 Apr 19.