1. Institute of Genetic Epidemiology, Medical University of Innsbruck , Innsbruck , Austria
2. Canada Excellence Research Chair in Genomic Medicine, McGill University , Montreal , Québec, Canada
3. Department of Human Genetics, Faculty of Medicine and Health Sciences, McGill University , Montréal, Québec, Canada
4. Department of Biostatistics and the Center for Statistical Genetics, University of Michigan , Ann Arbor , MI 48109 , USA
5. Institute for Biomedicine , Eurac Research, Bolzano , Italy