1. Institute of Social and Preventive Medicine (ISPM) University of Bern Bern Switzerland
2. Institute of Medical Biometry and Statistics, Faculty of Medicine and Medical Center—University of Freiburg Germany
3. Department of Primary Education University of Ioannina Ioannina Greece
4. Faculté de Médecine Université Paris Descartes Paris France
5. Departments of Health Promotion and Human Behavior and of Clinical Epidemiology Kyoto University Graduate School of Medicine/School of Public Health Kyoto Japan