1. Department of Epidemiology, Center for Public Health, Medical University of Vienna, Vienna, Austria
2. Department of Evolutionary Anthropology, University of Vienna, Vienna, Austria
3. Ministry of Defence, Vienna, Austria
4. Department of Cancer Epidemiology and Prevention Research, Alberta Health Services. Holy Cross Centre, Canada
5. Departments of Oncology & Community Health Sciences, Cumming School of Medicine, University of Calgary. Hospital Drive NW, Calgary, Canada