1. Department of Epidemiology, Fielding School of Public Health, University of California, Los Angeles
2. Department of Epidemiology, Fielding School of Public Health, University of California, Los Angeles2Department of Neurology, School of Medicine, University of California, Los Angeles
3. Arizona Respiratory Center, the BIO5 Institute, University of Arizona, Tucson4Global Clinical Epidemiology, Drug Safety, and Epidemiology, Novartis Farmaceutica SA, Barcelona, Spain
4. Department of Epidemiology, Fielding School of Public Health, University of California, Los Angeles5Department of Health Care Management, College of Healthcare Administration and Management, National Taipei University of Nursing Health Sciences, Taipei, T
5. Department of Epidemiology, Fielding School of Public Health, University of California, Los Angeles6The Institute of Public Health, University of Aarhus, Aarhus, Denmark