Vincent von Hoeckendorf1,2, Frank W Stahnisch3. 1. Department of Community Health Sciences and History, Hotchkiss Brain Institute and O'Brien Institute for Public Health, University of Calgary, 3280 Hospital Drive N.W., Calgary, AB, T2N 4Z6, Canada. 2. Cognitive Science Program, University of Osnabrück, Albrechtstrasse 28, 49076, Osnabrück, Germany. 3. Department of Community Health Sciences and History, Hotchkiss Brain Institute and O'Brien Institute for Public Health, University of Calgary, 3280 Hospital Drive N.W., Calgary, AB, T2N 4Z6, Canada. fwstahni@ucalgary.ca.