1. School of Public Health, University of Haifa, Haifa, Israel
2. Movement Disorders Unit, Department of Neurology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
3. Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
4. Epidemiology Unit, Rambam Medical Center, Haifa, Israel
5. Maccabi Healthcare Services, Tel Aviv, Israel