1. Jonathan Borak & Company, New Haven, CT, USA;
2. Department of Environmental Health Sciences, Yale School of Public Health, New Haven, CT, USA;
3. Departments of Medicine and Epidemiology & Public Health, Yale School of Medicine, New Haven, CT, USA;
4. Department of Neurology, Center for Neuroepidemiology and Clinical Neurological Research, Yale School of Medicine, New Haven, CT, USA;
5. Department of Chronic Disease Epidemiology, Yale School of Public Health, New Haven, CT, USA