1. Department of Medicine, Clinic of Social and Family Medicine, University of Crete, Heraklion, Crete, Greece
2. Division of Prevention and Rehabilitation, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
3. Division of Cardiology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
4. Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece