Bopp Matthias, Spoerri Adrian, Zwahlen Marcel, Gutzwiller Felix, Paccaud Fred, Braun-Fahrländer Charlotte, Rougemont André, Egger Matthias
Institute of Social and Preventive Medicine (ISPM), University of Zurich, Zurich, Switzerland.
Int J Epidemiol. 2009 Apr;38(2):379-84. doi: 10.1093/ije/dyn042. Epub 2008 Mar 7.