1 Department of Cancer Epidemiology and Prevention Research, Alberta Health Services, Calgary, Alberta, Canada.
2 Preventive Oncology & Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
3 Department of Epidemiology, Center for Public Health, Medical University of Vienna, Kinderspitalgasse 15, Vienna, Austria.
4 Ministry of Defence, Vienna, Austria.
5 Statistics Austria, Vienna, Austria.
6 Department of Epidemiology, Center for Public Health, Medical University of Vienna, Kinderspitalgasse 15, Vienna, Austria. thomas.waldhoer@meduniwien.ac.at.